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Hello all!
I'm trying to root my HTC Legend using Chirag's manual.
I somehow managed to complete all steps until step 4 (that is, flashing the rooted rom), but now i'm stuck.
I but the phone in fastboot mode, plug it to my computer, and the phone says "fastboot USB". When i run 'step1-windows.bat', nothing happens, i get the message:
"Legend Root Step 1
Erasing cache and rebooting in RUU mode...
<waiting for device>"
And that is all. Any ideas? It would be pretty lousy to go through all those steps, including downloading and losing all apps not to be able to finish the very last step...
--edit--
I do have superuser "app" in the drawer of my legend. Don't know if it's important...
Ok, so my PC doesn't see the legend when in FASTBOOT mode, "adb devices" returns an empty list. When the phone is on, and normal, i see it with adb services.
Okay, made it past step one. I turned off HTCSync, and the PdaNet, which i installed earlier (i was that desperate). Nothing seemed to work. I then entered FASTBOOT mode, plugged it into the PC, and then in control panel went to 'devices', found 'Android 1.0 devices' and installed the drivers automatically. The moment i did that, step one started to work, and finished in about couple of minutes.
Just in case someone else gets this problem, this is the solution.
Now starting step 2, i hope it will succeed.
--edit--
Yesss!!! It worked like a charm, i now (finally) have rooted 2.1 with sense
Sorry for talking to myself, but i wanted to share the solution, i usually get pissed when someone solves his problems and doesn't share
Nah Your all right with me, its good to see you managed to get it fixed on your own. I think all the guides need to be updated with that information regarding the need for android 1.0 drivers as it seams to be THE most common issue when not being able to get through the rooting steps.
Enjoy and have fun!
Sent from my HTC Legend using XDA App
The Problem:
Phone stuck on LG logo screen with "Security Error" written underneath.
How I Got Here:
Rooted and installed recovery using apks found in these forums. I successfully restored a CWM backup zip found on these forums. Next, I decided to try flashing a ROM. SuperLuminal gave me a "Status 7" error, but when I checked over the thread, I realized that the P769 was not specifically mentioned as a compatible device. So, I decided to give PACman ROM a try, but got the same error.
I googled "status 7 error" and found a guide for fixing this (removing "assert" line in updater-script line). I was aware of the danger in doing this, but since PACman ROM stated "P769" right there in the title, I gave it a shot. Now I'm stuck with the "security error" screen.
What I tried:
I could no longer get into recovery, so I thought restoring it might be a good idea. I tried to use fastboot using the method described in this thread (http://forum.xda-developers.com/showthread.php?t=2310569). However, I quickly realized that I didn't know how to put the phone into a "download mode" like most other phones I've worked with.
I then tried B2CAPP, but phone couldn't be detected. Went and learned how to get into s/w upgrade mode, ran recovery and got an error message saying "updating is not possible any longer due to a fatal error..."
Next, I tried uninstalling all LG software and rebooting PC. Installed LG PC Suite found here (http://en.kioskea.net/download/download-19186-lg-pc-suite), allowed the program to update to latest version. Then tried to run Emergency Firmware Recovery, which opened a window asking if I want to run LG Mobile Support Tool. I clicked OK and was taken to an app that looked exactly like B2CAPP and gave me the same error as above.
So in conclusion, I can only access two screens: the LG logo security error screen and the s/w upgrade screen. Neither appears to give me access to fastboot/adb nor to LG's recovery tools. Am I permanently bricked or is there a way out of this mess? I've been searching these forums extensively and have tried every method I could find. I'm out of options, so I'm kinda freakin out here. Can anyone please help me figure out what else to try?
You did some studying for sure, but you needed to do some more before jumping in.
1. http://forum.xda-developers.com/showthread.php?p=41768774
2. http://forum.xda-developers.com/showpost.php?p=43210006&postcount=15
3. http://forum.xda-developers.com/showthread.php?p=43642515
Please read each thread before starting and read the instructions txt found in Lelus fastboot zip
Sent from my LGMS769 using xda app-developers app
Kuma82, I can't thank you enough for your helpful response.
Here's a shortened version of what I did, in case someone out there finds themselves in a tough spot like I was in:
1. Installed OMAP drivers using method described in link above (right-click on device in Device Manager, manually install driver, etc.). Fastboot worked after this
2. Using Lelus' Fastboot, flashed option 6 (load JB xloader and uboot). This gave me an inverted purple LG logo that still said "security error"
3. I think tried to use fastboot to flash the p4_769.img recovery file. No change. Loading up s/w upgrade mode and the LG Mobile support tool (B2CAPP) was no use (stuck at 15%, no connection to phone).
4. Once again, using one of the links above, I downloaded 3 .img files and proceeded to erase uboot, boot and recovery and flashed those .img files instead. When I rebooted the phone, I got the regular LG logo for a second, then a white flash and then a smaller LG logo with "security error"
5. Now, I installed the LG United mobile driver, went into s/w upgrade mode again and ran the Mobile tool. Got the "updating is not possible..." error again
6. Searched for the offline flash fix method and followed it step-by-step, word-for-word. Phone works again!
I'm pretty sure I could have just done steps 1, 4 and 6 and achieved the same result.
Hope this helps someone, and thanks again Kuma82!
I've had this happen to me twice and was able to get out of it really easily. Basically, I just have my desktop set up for offline flashing and my laptop for online. Just popped into S/W update mode and plugged it into the laptop, started the b2c app, clicked on the "recovery phone" option, and went for a snack. Fixed when I came back.
No problem, glad I could help.
Now that you know how to use fastboot, you are pretty much ready for everything.
It took me a couple of tries to get it running.
Use the new root method, http://forum.xda-developers.com/showthread.php?t=2338816
If you plan on staying on stock, get the cwm for locked bootloader, but first get this busy box http://forum.xda-developers.com/showpost.php?p=43395803&postcount=260
Then this cwm
http://forum.xda-developers.com/showpost.php?p=41613095&postcount=220
Sent from my LG-P769 using xda app-developers app
kuma82 said:
You did some studying for sure, but you needed to do some more before jumping in.
1. http://forum.xda-developers.com/showthread.php?p=41768774
2. http://forum.xda-developers.com/showpost.php?p=43210006&postcount=15
3. http://forum.xda-developers.com/showthread.php?p=43642515
Please read each thread before starting and read the instructions txt found in Lelus fastboot zip
Sent from my LGMS769 using xda app-developers app
Click to expand...
Click to collapse
Dear, Kuma82!
Thank you very much fot your instruction! It really saves my LGP768 from "security error"! I follow 3 steps and it works, GREAT!
Thank you again and this forum too!
Please help! Bricked LGMS769 (P769)
Solved. The LGMobile Support Tool needed to run on a different computer. It worked when I put the phone into SW Update Mode (press up volume key and plug in USB) and then ran the LGMobile Support Tool.
By the way, this is how I got the phone recovered after it was booting to the small LG logo with the "security error" message as mentioned in Step 4 above.
First of all, I apologize for having uploaded all the figures of my post in the "figure.zip" attachment, but I was not able to insert them as separate figures using the "insert image" function. I am a new user and perhaps I am not allowed to use this function.
I am not able to recover from a "soft brick" due to an aborted flash of a stock ROM. Here is the story.
I started working with this LG phone:
Model: L9 P760 (Vodafone brand)
OS Android 4.1.2 Jelly Bean (it was previously updated form ICS through the official upgrade from LG)
SW Version: P760 20d-262-02
Kernel: 3.0.31
Build: JZ054K
Baseband: L626_MODEM_SIC_01.1230.00
My goal was to re flash with another JB stock ROM, so upgrading its release and getting an unbranded phone.
I downloaded this stock ROM kdz file: V20H_00.kdz
Then I tried to flash with a procedure derived from this one: http://forum.xda-developers.com/showthread.php?t=2085344
The main difference was related to the fact that I did not put the smartphone in S/W Upgrade status at the beginning, I connected it to USB port when it was power on and set the PhoneMode to "DIAG" instead of "EMERGENCY". The phone went in "S/W Upgrade" mode during the flash procedure.
I worked on my laptop, the operating system is Windows 7 Professional, SP1 64 bit.
A problem occurred during the update: the LG Mobile Support Tool crashed and the phone remained in "S/W upgrade" status. I restarted the LG Mobile Support Tool, but I was not able to make it continue the update. Then I disconnected the phone from USB and removed the battery. When I re inserted the battery the phone did not boot anymore.
Now my LG L9 P760 does not start pushing the normal power on button.
It does not make a factory reset if I push Power on, home and vol- buttons
There are no any combination of buttons I can start for having any reaction from my LG L9.
Then, I tried to recover from this "soft brick" status in the way I describe hereunder.
1) I removed everything related to LG from my laptop (LG Mobile tool -including LGMOBILEAX directory under C:\ProgramData- and LG drivers)
2) I installed the following LG SW:
LG drivers, rel. 3.11.3, from a file named: LGUnitedMobileDriver_S50MAN311AP22_ML_WHQL_Ver_3.11.3.exe
LG Mobile Support Tool rel. 1.7.3.0, installed through this program: B2CAppSetup.exe, running in Windows XP SP3 compatibility mode. From file properties , tab "details" I read this B2CAppSetup.exe is ver. 1.0.1.7.
3) I connected the smartphone to my laptop through the USB cable. After about 10 - 15 seconds it went in SW upgrade mode. At least, I see "S/W Upgrade - Please Wait while upgrading...." on the LG L9 screen. BTW, that occurs every time I connect the smartphone to my PC, in any cases: removing the battery or not removing it, pressing or not the vol+ button... In any cases it goes in that state.
Before connecting the smartphone, this is what Device manager showed:
[pls see devManager-phoneNotConnected.PNG in figure.zip]
After I connected the smartphone through USB, this is what Device Manager displayed:
[pls see devManager-phoneConnected.PNG in figure.zip]
Without starting the LG Mobile Support Tool I saw that after some minutes its display did not show the "S/W upgrade" message anymore, nothing was displayed. And after about 10 seconds the "S/W Upgrade.." message came back again. It is like the smartphone tried to connect to some applications running on the laptop, but did not find any process there, then it retried, and so on.
When the LG display was black, the Device manager output was like it was before connecting the smartphone to USB port. When "S/W Upgrade..." came back on the LG display, LG devices came back on Device Manager output.
4) At this point, when "S/W Upgrade.." was displayed on LG I started the LG Mobile Support Tool. It seemed it was able to recognize my smartphone, as I saw this output.
[pls see LG_MobileSupportTool-start.PNG in figure.zip]
But waiting for 1 or few minutes without doing anything the "S/W upgrade..." message disappeared on my LG display and LG Mobile Support Tool showed this output:
[pls see LG_MobileSupportTool-start01.PNG in figure.zip]
It was like the connection between the smartphone and the LG Mobile Support Tool could not be kept, or was not stable.
5) Anyway, when the connection seemed to be ok I selected the choice "Upgrade Recovery" under "Options" menu choice, and the recovery procedure started. This is the sequence output I saw on the LG Mobile Support Display:
[pls see LG_MobileSupportTool-start02.PNG in figure.zip]
[pls see LG_MobileSupportTool-start03.PNG in figure.zip]
[pls see LG_MobileSupportTool-start04.PNG in figure.zip]
But during the "Upgrading your phone..." phase, the process was always blocked at 15% of its execution (it remained at 15% for a relatively long time, let's say 2 or 3 minutes) and I read this output:
[pls see LG_MobileSupportTool-start05.PNG in figure.zip]
Now, if I retry the procedure (with or without disconnecting the phone, removing the battery and so on and the reconnecting) I get this message if I push the "retry" button when the LG display is black.
[pls see LG_MobileSupportTool-start06.PNG in figure.zip]
Otherwise, If LG display indicates "S/W Upgrade..." the procedure restarts, but always with the same result: it aborts at 15% of progress, and LG Mobile Support Tool shows the same error:
I tried a lot of alternatives avoiding to download the ROM image online from LG site. I tried the procedures I found here http://forum.xda-developers.com/showthread.php?t=2085344 and also here http://forum.xda-developers.com/showthread.php?t=2797190, where I found an interesting and more recent tool for an off line KDZ flash.
I tried to flash a couple of diferent KDZs: v20c_00.kdz -ICS- and V20H_00.kdz (JB) but always the procedure was aborted during the update.
I believe my problem should be related to 3 main factors:
Some issues on LG drivers, also if somehow my phone is detected by LG Mobile Support Tool, when I connect it via USB cable.
Some issues with the LG tools I use (or perhaps I do not configure everything needed in the right way, or perhaps there are issues with Windows 7 64 bit)
Some issues with the kdz I use. Perhaps I could adopt some othe stock ROMs (also if I have already tried with 2 different KDZ).
I tried these procedure using other PCs, another Win 7 64 bit and an XP SP3 32 bit, but basically the problem is always the same: the recovery / flash procedure is aborted at 15% of its progress.
Who could give me any advices on what could be the reason of this fault, and on what procedure I could do?
I have not tried anything related to adb or fastboot till now, as in my opinion my issue should not require these tools in order to be solved. I mean, my LG L9 easily goes in "S/W Upgrade.." mode, so it does not seem the problem is related to a boot loop status. Anyway, could a flash via fastboot solve my issue?
Pls help me, I can give you every additional details it could be useful...
Thank you in advance!
Ciao
Mauro
Hi Rossi Corsa, you could try this way http://forum.xda-developers.com/showthread.php?p=53820375
Cheers. Good luck.
Sent from my LG P76020p-EUR-XX unlocked and rooted
BajoPrimate said:
Hi Rossi Corsa, you could try this way http://forum.xda-developers.com/showthread.php?p=53820375
Cheers. Good luck.
Sent from my LG P76020p-EUR-XX unlocked and rooted
Click to expand...
Click to collapse
TY BajoPrimate, that thread gives me a hope!
But I still need your help. I tried that procedure, and I got an error very similar to the others described there: download failed after 6 sec..... So I tried to download the bin image for P760 that you indicated here, but the URL "http://uploaded.net/f/xh3dqq " seems to be not reachable anymore....
Where could I find a binary image to flash for my P760?
Do you want me to describe the error I got in a post on that thread? Of course I'll do if that is more correct in your opinion.
TY very much in advance!
Ciao
Mauro
Hi Rosso Corsa, you're welcome.
The download link works fine for me.
Try again from your computer or with another browser (i. e. dolphin).
Cheers. Good luck.
Sent from my LG P76020p-EUR-XX unlocked and rooted
BajoPrimate said:
Hi Rosso Corsa, you're welcome.
The download link works fine for me.
Try again from your computer or with another browser (i. e. dolphin).
Cheers. Good luck.
Sent from my LG P76020p-EUR-XX unlocked and rooted
Click to expand...
Click to collapse
BajoPrimate, ty for your support.
I tried do get to this address:
uploaded.net/f/xh3dqq
And also to this one (after having seen the image you posted in your last append:
uploaded.net/file/j32p8p7y/from/xh3dqq
but in both the cases I got a "Unable to connect" message.
I tried from my laptop with Firefox, Internet Explorer and Chrome, getting always the same result.
Do you know what I could try to get this bin image?
On alternative, do you know any other address where I could find a bin image for my LG P760?
It seems the tool for getting a bin image from kdz is not running correctly. At least I got the same error messages others indicated....
TY very much!
Ciao
Mauro
Rosso Corsa said:
BajoPrimate, ty for your support.
I tried do get to this address:
uploaded.net/f/xh3dqq
And also to this one (after having seen the image you posted in your last append:
uploaded.net/file/j32p8p7y/from/xh3dqq
but in both the cases I got a "Unable to connect" message.
I tried from my laptop with Firefox, Internet Explorer and Chrome, getting always the same result.
Do you know what I could try to get this bin image?
On alternative, do you know any other address where I could find a bin image for my LG P760?
It seems the tool for getting a bin image from kdz is not running correctly. At least I got the same error messages others indicated....
TY very much!
Ciao
Mauro
Click to expand...
Click to collapse
Hi Rosso Corsa, you're welcome.
I don't have any other link.
You could try without your firewall or antivirus or with another PC (friends, family,neighbours,...).
Eventually you'll got it!
Cheers. Good luck.
Hi all,
I recently got a new Dell Venue 7 3740 (yeah, not my first choice, but it was free for buying a computer). Anyway, started reading up on how to root the thing. I have a couple of apps that require root.
I found this thread: http://forum.xda-developers.com/dell-venue/development/guide-how-to-root-android-4-4-4-dell-t2918427
and also the main Dell page: http://opensource.dell.com/releases/Venue_7_3740_Merrifield/developer-edition/
Following Dell's guide to rooting appears to NOT root it. Installing Root Checker confirms I don't have root. Unbricked it and got it back up from 4.4.2 to 4.4.4. By reading the first guide for the 3840, my question is ...
Is the boot image linked there compatible with my 3740?
(yeah, I know this should be in the developer section ... unfortunately I don't have enough posts ... also, I am familiar with rooting/flashing/etc, my first device that I put CM7 on was the original Galaxy S1 ... and I have CM10 on my S3.)
Tried, failed
Yeah I got this tablet with a PC too and tried rooting. It FUBAR'd on me and I had to wrestle with unbricking it. Which sorry to say is a job and a half, the images on Dell's site are corrupt for this WiFi only version (no partition.tbl file, system image incomplete). Ending up downloading the LTE versions firmware to get the missing files and rewriting the batch as the file names for the fastboot commands were wrong too. And even then the tablet wouldn't boot, so I had to store the OTA on an SD card and use recovery to flash it. Unfortunately that leaves me with 4.4.2 and the dreaded clock and browser issues. And OTA doesn't work, it keeps saying no updates are available. Spoke with a Dell rep who said OTAs were suspended and to try again in a week but I think OTA was broken for me when I tried rooting and boot loader was unlocked (which the PDF on Dell's site warns you about).
So now I have a working tablet that skips hours ahead and has general stability issues.
reaper-death said:
Yeah I got this tablet with a PC too and tried rooting. It FUBAR'd on me and I had to wrestle with unbricking it. Which sorry to say is a job and a half, the images on Dell's site are corrupt for this WiFi only version (no partition.tbl file, system image incomplete). Ending up downloading the LTE versions firmware to get the missing files and rewriting the batch as the file names for the fastboot commands were wrong too. And even then the tablet wouldn't boot, so I had to store the OTA on an SD card and use recovery to flash it. Unfortunately that leaves me with 4.4.2 and the dreaded clock and browser issues. And OTA doesn't work, it keeps saying no updates are available. Spoke with a Dell rep who said OTAs were suspended and to try again in a week but I think OTA was broken for me when I tried rooting and boot loader was unlocked (which the PDF on Dell's site warns you about).
So now I have a working tablet that skips hours ahead and has general stability issues.
Click to expand...
Click to collapse
Hmm ... Interestingly enough, I ran through the unbrick procedure from Dell, and didn't have any issues with it whatsoever. I'm not sure if they updated the TGZ since you updated.
I have read that root is for ADB to start with. Can anyone confirm this? If so, then which package could I get for a superuser binary?
ProfM2 said:
Hmm ... Interestingly enough, I ran through the unbrick procedure from Dell, and didn't have any issues with it whatsoever. I'm not sure if they updated the TGZ since you updated.
I have read that root is for ADB to start with. Can anyone confirm this? If so, then which package could I get for a superuser binary?
Click to expand...
Click to collapse
I did this process just a couple days ago so everything I pulled from opensource.dell was current. The unbrick tgz on the site shows up as 128mb for the wifi only A1195 and the A5195 shows as 821mb (odd). When I extracted the tgz it said "unexpected end" or something like that on the system image. Then again when I extracted from that extracted tgz.
Following the root process initially worked and the temp cwm recovery let me flash the supersu update. It booted with su just fine and I tried a couple apps that needed root and they worked. Once I rebooted again the tablet showed up with a USB icon and would go no further. Never having dealt with Intel SoC drivers it took me a while to get them installed properly, and then I eventually understood what "full power off" meant lol.
Do you know how I can relock the bootloader and get OTA working again, assuming I'm already on 4.4.2 from the OTA zip installed via recovery?
Thanks.
reaper-death said:
I did this process just a couple days ago so everything I pulled from opensource.dell was current. The unbrick tgz on the site shows up as 128mb for the wifi only A1195 and the A5195 shows as 821mb (odd). When I extracted the tgz it said "unexpected end" or something like that on the system image. Then again when I extracted from that extracted tgz.
Following the root process initially worked and the temp cwm recovery let me flash the supersu update. It booted with su just fine and I tried a couple apps that needed root and they worked. Once I rebooted again the tablet showed up with a USB icon and would go no further. Never having dealt with Intel SoC drivers it took me a while to get them installed properly, and then I eventually understood what "full power off" meant lol.
Do you know how I can relock the bootloader and get OTA working again, assuming I'm already on 4.4.2 from the OTA zip installed via recovery?
Thanks.
Click to expand...
Click to collapse
You better redo the unbrick procces cause as you are now, you won't be able to update your tablet and 4.4.2 has some issues with the clock and browser. The best way to root is by thetered cwm, I did it and it's working great.
reaper-death said:
I did this process just a couple days ago so everything I pulled from opensource.dell was current. The unbrick tgz on the site shows up as 128mb for the wifi only A1195 and the A5195 shows as 821mb (odd). When I extracted the tgz it said "unexpected end" or something like that on the system image. Then again when I extracted from that extracted tgz.
Click to expand...
Click to collapse
This is quite odd. From the documentation, it appears that the A195 is for the LTE version, and the A150 is Wifi only. Since I have the 3740 Wifi only, I only pulled the A150 version.
The Unbricking process was very straightforward and everything went smoothly, and after it rebooted, it prompted that there was a system update from Dell, and that took me from the 4.4.2 from the TGZ, to 4.4.4
ProfM2 said:
This is quite odd. From the documentation, it appears that the A195 is for the LTE version, and the A150 is Wifi only. Since I have the 3740 Wifi only, I only pulled the A150 version.
The Unbricking process was very straightforward and everything went smoothly, and after it rebooted, it prompted that there was a system update from Dell, and that took me from the 4.4.2 from the TGZ, to 4.4.4
Click to expand...
Click to collapse
http://opensource.dell.com/releases/Venue_7_3740_Merrifield/developer-edition/Doc/OSS_A150&A195.pdf
* For Wifi-only device on A150 and Wifi / LTE device on A195
I see it now, I think I was misinterpreting the above statement which means I've been flashing the A195 rom this whole time. Thank you all for your help! :good:
After getting my 3740 back to "Unbricked" mode, and OTA upgraded to 4.4.4, it appears that I'm completely locked out of the rooting process.
I've tried to start over with the Dell info (unlocking bootloader), however, neither of my PC's will detect the tablet when using xFSTK (one PC - Win8.1-64bit, other XP-32bit). The tablet IS detected, however, it appears that the drivers are no longer correct(?).
I normally run Ubuntu, and thats where my Android development setup is on ... I see that xFSTK is available for Linux ... has anyone used it? or would I be better trying to fight Windows?
ProfM2 said:
After getting my 3740 back to "Unbricked" mode, and OTA upgraded to 4.4.4, it appears that I'm completely locked out of the rooting process.
I've tried to start over with the Dell info (unlocking bootloader), however, neither of my PC's will detect the tablet when using xFSTK (one PC - Win8.1-64bit, other XP-32bit). The tablet IS detected, however, it appears that the drivers are no longer correct(?).
I normally run Ubuntu, and thats where my Android development setup is on ... I see that xFSTK is available for Linux ... has anyone used it? or would I be better trying to fight Windows?
Click to expand...
Click to collapse
It is mentioned somewhere that the 3740 and the 3840 use the same firmware. Assuming that, what you can do is download the latest SuperUser zip, copy it to the internal or external storage, then use THIS, or THIS to root through CWM.
graphdarnell said:
It is mentioned somewhere that the 3740 and the 3840 use the same firmware.
Click to expand...
Click to collapse
Hmmm ... I took this to mean that I could use the same boot.img as the Venue 8, and tried the process from this thread: http://forum.xda-developers.com/dell-venue/development/guide-how-to-root-android-4-4-4-dell-t2918427
NOPE. (Don't try, it'll cause the tablet to go into the "help my androids' fallen and can't get up" icon. )
ProfM2 said:
Hmmm ... I took this to mean that I could use the same boot.img as the Venue 8, and tried the process from this thread: http://forum.xda-developers.com/dell-venue/development/guide-how-to-root-android-4-4-4-dell-t2918427
NOPE. (Don't try, it'll cause the tablet to go into the "help my androids' fallen and can't get up" icon. )
Click to expand...
Click to collapse
I'm curious as to what it is you're trying to do. Why do you insist on having a developer's root (just the use of ADB shell), as opposed to full root flashing SuperSu from custom recovery?
graphdarnell said:
I'm curious as to what it is you're trying to do. Why do you insist on having a developer's root (just the use of ADB shell), as opposed to full root flashing SuperSu from custom recovery?
Click to expand...
Click to collapse
I just want full root.
Most of the info that I've read on here and elsewhere are geared to the 3830/3840. Not as much for the 3740. So, by playing with the device and learning what works/doesn't work, possibly others may find this info useful to them.
I've been having issues seeing the device from XP, Win8.1 and Ubuntu, in the 'off' state of the tablet, when the PC should be seeing the merrifield. Just this morning, after bricking it last night, I discovered that my PC seems to see the device right away if I press Vol+ while plugging in the microUSB. (again, something that may help someone else) I was planning on double checking this info later today, to make sure that it wasn't a fluke.
I do appreciate both of the links that you've posted in this thread, and I will check them out. Of course, both are labelled for the Venue 8, not the Venue 7 that I have. Since I've gained knowledge on the unbrick process I feel more comfortable trying them.
I've installed (or tried to install) SuperSU from the Play store, but it didn't appear to help much, since I didn't have the custom recovery setup at that time. I'll work on that tonight.
ProfM2 said:
I just want full root.
Most of the info that I've read on here and elsewhere are geared to the 3830/3840. Not as much for the 3740. So, by playing with the device and learning what works/doesn't work, possibly others may find this info useful to them.
I've been having issues seeing the device from XP, Win8.1 and Ubuntu, in the 'off' state of the tablet, when the PC should be seeing the merrifield. Just this morning, after bricking it last night, I discovered that my PC seems to see the device right away if I press Vol+ while plugging in the microUSB. (again, something that may help someone else) I was planning on double checking this info later today, to make sure that it wasn't a fluke.
I do appreciate both of the links that you've posted in this thread, and I will check them out. Of course, both are labelled for the Venue 8, not the Venue 7 that I have. Since I've gained knowledge on the unbrick process I feel more comfortable trying them.
I've installed (or tried to install) SuperSU from the Play store, but it didn't appear to help much, since I didn't have the custom recovery setup at that time. I'll work on that tonight.
Click to expand...
Click to collapse
A quick word on getting the device recognized in off mode, what worked for me was it needs to be completely powered off and nothing showing on the tablet screen then connect and bring up the device manager. Whatever shows up needs to be "Intel SoC" so change the driver to that if needed. When flashing firmware to unlock the bootloader the device's boot screen will show an "Intel Inside" logo instead of the normal "Dell" logo. I ended up running xFSTK commands in advance (they'll wait) and then running over to hook up the tablet (powered off) via USB as for some reason it'll show up and then I hear "da-Dunk" in Windows (device disconnected) after a short while which interrupts the process (same with fastboot commands). This was the unbrick process in a nutshell for me and I'm leaving it now as is (OTA'd to 4.4.4) until hopefully the supposed update to Lollipop comes around and maybe some progress is made on rooting it.
Hope this helps you!
reaper-death said:
A quick word on getting the device recognized in off mode, what worked for me was it needs to be completely powered off and nothing showing on the tablet screen then connect and bring up the device manager. Whatever shows up needs to be "Intel SoC" so change the driver to that if needed. When flashing firmware to unlock the bootloader the device's boot screen will show an "Intel Inside" logo instead of the normal "Dell" logo. I ended up running xFSTK commands in advance (they'll wait) and then running over to hook up the tablet (powered off) via USB as for some reason it'll show up and then I hear "da-Dunk" in Windows (device disconnected) after a short while which interrupts the process (same with fastboot commands). This was the unbrick process in a nutshell for me and I'm leaving it now as is (OTA'd to 4.4.4) until hopefully the supposed update to Lollipop comes around and maybe some progress is made on rooting it.
Hope this helps you!
Click to expand...
Click to collapse
I have finally settled down and got the tablet rooted. What's really odd, was Win8.1 kept losing the proper driver. I'm not sure exactly why ... but suffice it to say, I got it working. It did appear to be more stable when I hit the Vol+ and plugged in the USB, but then again it may have been a coincidence.
Open source dell
If you follow the link to dell open source, they do have a detailed PDF download for unlocking the boot loader etc. The file was too large for me to upload on XDA. I just found it today while I was researching how to root this tablet. I have not had a chance to try it yet.
http://opensource.dell.com/
That doesnt work for 3740 lte. I;ve done everything that was in PDF. OTA image should be with unlocker bootloader and root but its not. ;/
Its adb root not su big difference
Does anyone have any idea to root dell venue 7 3740 lte
The open source is for venue 7 3740 wifi
how can i hard reset this device please tell me.
Mahisasur said:
how can i hard reset this device please tell me.
Click to expand...
Click to collapse
Reset any android tbalet with ...
Setting >>>>> Backup & Reset >>>>> Factory Data Reset >>>>> Reset Tablet >>> Erase Everything
I have a LG K7 that will boot to system, but no matter how many times I try, it wont boot into either download mode or recovery mode. I've tried the combos of vol down + power and vol up + power and every other combination I can think of. Pulled the battery and it didn't improve.
Anybody ever see something like this? Any suggestions on how to get it to work?
BigZ1 said:
I have a LG K7 that will boot to system, but no matter how many times I try, it wont boot into either download mode or recovery mode. I've tried the combos of vol down + power and vol up + power and every other combination I can think of. Pulled the battery and it didn't improve.
Anybody ever see something like this? Any suggestions on how to get it to work?
Click to expand...
Click to collapse
Tried ADB commands?
adb reboot recovery
adb reboot bootloader
bmwdroid said:
Tried ADB commands?
adb reboot recovery
adb reboot bootloader
Click to expand...
Click to collapse
Yes, and adb devices shows nothing. I'm wondering if the bootloader is locked and maybe that's why I'm having problems.
Also, I'm having problems getting TWRP to load. Do you know what version of TWRP will work with K7?
Do you have to root first before installing TWRP from the playstore?
BigZ1 said:
Yes, and adb devices shows nothing. I'm wondering if the bootloader is locked and maybe that's why I'm having problems.
Click to expand...
Click to collapse
If "adb devices" shows nothing imo it's not recognised so not possible to flash.
Tried other cable/port?
BigZ1 said:
Also, I'm having problems getting TWRP to load. Do you know what version of TWRP will work with K7?
Click to expand...
Click to collapse
No idea as I own a G5.
BigZ1 said:
Do you have to root first before installing TWRP from the playstore?
Click to expand...
Click to collapse
Never did that.
Always flashed directly but I guess so.
bmwdroid said:
If "adb devices" shows nothing imo it's not recognised so not possible to flash.
Tried other cable/port?
No idea as I own a G5.
Never did that.
Always flashed directly but I guess so.
Click to expand...
Click to collapse
tried another cable and different port. Status Quo!
Any other ideas/thoughts?
@BigZ1 sorry, none.
OK, finally can get into firmware mode and also recovery mode. Reason I needed this is to be able to try loading custom roms on this old phone. Now I'm on to the next pothole in the road.
I would like to install twrp. twrp from the playstore wont install unless you are rooted. I am using stock rom android 5 unrooted. I've looked at all the options and from what I see, I have the classic chicken and the egg dilema. Can't flash until my OS is rooted, and cant root without flashing.
The only way out is to use adb to flash the twrp file. Unfortunately I can't get adb devices command to acknowledge any devices. I have usb debugging on, and by connecting to a windows computer, I can view internal storage. So the device is communicating, but not via adb commands.
I tried to use the LGUP tool from LG, but it wont let me select my device, It sees the correct model of phone on Com3, but wont let me select the model. I think it's because LG has turned off their servers and cast us adrift.
If anybody has any ideas, it would be much appreciated.
I think my best bet is to get adb devices to work, or find a way to root my OS. I just cant figure out how to make that work. Help, please!!!!
BTW, in the stock recovry mode, LG has removed everything useful (e.g. install zip, reboot options, wipe cache, etc.) so the only option there is factory data reset. Thanks a lot LG!!!!!
BigZ1 said:
....The only way out is to use adb to flash the twrp file........
Click to expand...
Click to collapse
Sorry to tell you but afaik this won't work.
fastboot flash recovery <filename.img> would be the command but this will only work if it's unlocked.
BigZ1 said:
....Unfortunately I can't get adb devices command to acknowledge any devices. ......
Click to expand...
Click to collapse
I doubt that fastboot will work if adb isn't but it's worth a try.
You are right, a fastboot command would do it. Only reason I mentioned adb devices, is that if adb can't see the devices, fastboot wont either. I'll try it again, but so far no luck.
What I don't understand is why usb debugging lets me look at the internal files, but adb devices doesn't work. Perhaps you are right, the bootloader may be locked. Only thing I could find about that is in developer options I turned on OEM unlock.
Is there any other way to unlock the bootloader?
Sure wish I could get some of the LG tools working. They might enable flashing of twrp recovery or one of the various zip files that would root my OS.
Any more ideas? I'm desperate enough to try most anything....
One more question. When you try to execute adb or fastboot commands, should you be in what LG calls "firmware download" mode? Seems to me that when I did adb or fastboot commands on other vendors phones, I was able to do so while the OS was running.
Grasping for straws....
Well, it looks like you are right. There is a fastboot command
fastboot oem unlock
that would unlock the bootloader. Unfortunately while it's locked, I can't get fastboot to recognize any devices, so I can't unlock it.
Is there any way around this?
BigZ1 said:
Well, it looks like you are right. There is a fastboot command
fastboot oem unlock
that would unlock the bootloader. Unfortunately while it's locked, I can't get fastboot to recognize any devices, so I can't unlock it.
Is there any way around this?
Click to expand...
Click to collapse
Fastboot is afaik only working in download/bootloader mode.
ADB working on any other.
So <adb reboot bootloader > usually gets you there (but adb doesn't work) or switch to it manually.
Idk if you need to flash an unlock.bin by LG.
Got it before 31.12.21 for my G5.
bmwdroid said:
Fastboot is afaik only working in download/bootloader mode.
ADB working on any other.
So <adb reboot bootloader > usually gets you there (but adb doesn't work) or switch to it manually.
Idk if you need to flash an unlock.bin by LG.
Got it before 31.12.21 for my G5.
Click to expand...
Click to collapse
Yeah, I just discovered that LG discontinued support on Dec 31, 2021. So, looks like I'm out of luck for getting anything from them.
My only hope is that someone has that lockbin file and would share it. Sure wish LG hadn't left me high and dry.
Now that LG support is gone, is there any forum that might have some kind of workaround for the bootloader?
anybody got a lockbin file for K7????
BigZ1 said:
Yeah, I just discovered that LG discontinued support on Dec 31, 2021. So, looks like I'm out of luck for getting anything from them.
My only hope is that someone has that lockbin file and would share it. Sure wish LG hadn't left me high and dry.
Now that LG support is gone, is there any forum that might have some kind of workaround for the bootloader?
anybody got a lockbin file for K7????
Click to expand...
Click to collapse
Oh yeah, one more thing. The phone is still of some use to me, if I can find a way to root it. So far all the stuff I tried (kingoroot, supersu, magisk) have failed.
Anybody got any suggestions???
BigZ1 said:
Yeah, I just discovered that LG discontinued support on Dec 31, 2021. So, looks like I'm out of luck for getting anything from them.
My only hope is that someone has that lockbin file and would share it. Sure wish LG hadn't left me high and dry.
Now that LG support is gone, is there any forum that might have some kind of workaround for the bootloader?
anybody got a lockbin file for K7????
Click to expand...
Click to collapse
The file got generated by LG after I entered a long code on their developers site which is afaik different for each device.
So someone elses unlock.bin might even harm your device.
You may be right, but at this point I don't have much to lose.
One thing I would like to do with the K7, is get it rooted. I can move files to the internal storage with usb debugging. I can't install any zip files and that makes it really difficult to find anything that can root it. Thanks again to LG for reducing the recovery menu to "factory reset data" so the phone has almost nothing useful.
If you can figure out a way that I can install zip files, please let me know.
I can't find anything that will let me flash the device without root, and I can;t get to root without some tools in the recovery menu.
Thanks
OK, I have not found a way to root. So I thought I'd take one last look at flashing/upating the firmware. I found a .kdz and a .tot file that I'd like to try. At this point I'm not risking much because the phone isn't worth much to me as is.
So, if you had a .kdz and .tot file to try out, what app would you use to flash it to the K7?
I tried to get LGUP to work and LG flash tool, but cant seem to make them work. If I knew what one to use, it would narrow my search. I'm trying to flash the K7 firmware by running exe files (LG UP, LG flash tool) on Windows 10.
What do you guys use?
BigZ1 said:
OK, I have not found a way to root. So I thought I'd take one last look at flashing/upating the firmware. I found a .kdz and a .tot file that I'd like to try. At this point I'm not risking much because the phone isn't worth much to me as is.
So, if you had a .kdz and .tot file to try out, what app would you use to flash it to the K7?
I tried to get LGUP to work and LG flash tool, but cant seem to make them work. If I knew what one to use, it would narrow my search. I'm trying to flash the K7 firmware by running exe files (LG UP, LG flash tool) on Windows 10.
What do you guys use?
Click to expand...
Click to collapse
So, I managed to find a patched version of LG flash tool (2.0.1.6) on this website (thanks to member ieatacid), that doesn't give me errors immediately after I open it. The first thing I notice is that it doesn't appear to recognize the K7. If I try checking the box for manual mode and adding the file I want to flash, the click start, it tells me to "select model dll file". This is probably a result of flash tool not recognizing the phone. Anyway, where am I supposed to find this .dll file? I've searched everywhere and came up empty handed.
Can anybody give me some enlightenment on what I am doing wrong? Any help at all will be much appreciated.
Is there a tutorial on use of the flash tool? I looked but haven't found it yet. Just some youtube videos that are terse and lacking in detail.
Thanks!
BigZ1 said:
So, I managed to find a patched version of LG flash tool (2.0.1.6) on this website (thanks to member ieatacid), that doesn't give me errors immediately after I open it. The first thing I notice is that it doesn't appear to recognize the K7. If I try checking the box for manual mode and adding the file I want to flash, the click start, it tells me to "select model dll file". This is probably a result of flash tool not recognizing the phone. Anyway, where am I supposed to find this .dll file? I've searched everywhere and came up empty handed.
Can anybody give me some enlightenment on what I am doing wrong? Any help at all will be much appreciated.
Is there a tutorial on use of the flash tool? I looked but haven't found it yet. Just some youtube videos that are terse and lacking in detail.
Thanks!
Click to expand...
Click to collapse
I don't know why I didn't think of this earlier. I own 3 LG phones (LGMS300m1, LM-X210ULMG10r. VS500PP9). I tried all 3 with LGUP tool. The tool recognized 2 of the 3, and failed to ID the LGMS300 (K7). Anybody got any ideas why the tool would recognize some but not others?
I am the only owner of the two phones that LGUP would ID. I guarantee that the bootloader on them was never touched (unlocked or locked, in any way). So that's not the answer.
It would be a big improvement for me, if I could at least get the LGUP tool to work for the K7.
BTW, I tried all 3 phones on the 2016 version of LG Flash Tool. All 3 failed to be identified.
Please, if anybody has a hypothesis for the odd behavior of the LGUP tool, I would love to hear it. Any suggestions are welcome.
BigZ1 said:
I don't know why I didn't think of this earlier. I own 3 LG phones (LGMS300m1, LM-X210ULMG10r. VS500PP9). I tried all 3 with LGUP tool. The tool recognized 2 of the 3, and failed to ID the LGMS300 (K7). Anybody got any ideas why the tool would recognize some but not others?
I am the only owner of the two phones that LGUP would ID. I guarantee that the bootloader on them was never touched (unlocked or locked, in any way). So that's not the answer.
It would be a big improvement for me, if I could at least get the LGUP tool to work for the K7.
BTW, I tried all 3 phones on the 2016 version of LG Flash Tool. All 3 failed to be identified.
Please, if anybody has a hypothesis for the odd behavior of the LGUP tool, I would love to hear it. Any suggestions are welcome.
Click to expand...
Click to collapse
Update on the never ending saga!
I found (on this website) an LGUP tool (version) that is for the MS330. So it works (albeit not so consistently). I was able to flash a .kdz file after several trials. Apparently when LGUP connects, it puts the MS330 in bootloader mode, waits 15 seconds for the device to respond and then begins flashing.
Now, here's the problem. I have a .tot file I'd like to flash. When trying to flash a .tot file, 15 seconds is not enough time for the device to respond, and I get an error for what appears to be an asynch error. That is to say, the MS330 took a second or two more that the 15 seconds to respond saying, yes i'm in bootloader mode.
Is there any way to give it a bit more time? Surely the members who use LGUP tool would have encountered this behavior, and would have found a solution.
Words of wisdom, anyone?