Which Stock Recovery Version for HTC One M8 - AT&T HTC One (M8)

There is a master list of stock recovery versions for the HTC One. How do I determine which version I should be using?

None of those. That is hardly a "master" list. It's over 3 years old, never updated past the original Kitkat (M8 release) recoveries, and woefully obsolete. You'll want your recovery number to match your OS number (main version on bootloader screen or getvar all). Also, none of those are valid for AT&T version M8 (which is what I assume you have, since this section is specifically for the AT&T M8). It would need to have "502" in the version number x.xx.502.x which specifically denotes AT&T.
Why exactly do you want stock recovery? Most folks want this, in order to get OTA updates. But you will also need a stock, never rooted ROM (unrooting doesn't work), and also must be connected to the AT&T network. It's probably easier to relock the bootloader, and update by RUU. Note that RUU will wipe all data from the phone. See RUU section in my Index thread: https://forum.xda-developers.com/showthread.php?t=2751432
If you really want stock recovery, you should be able to extract it from the firmware.zip. Find the right firmware version number from the firmware collection, and extract recovery.img from the "Stock, Full Wipe" firmware zip:
https://forum.xda-developers.com/htc-one-m8/development/progress-fuu-m8-t2813792

That is definitely helpful. Thank you. I didn't realize that I could pull the bootloader out of the firmware.zip. The phone was AT&T and later unlocked and made in to a rooted Cyanogenmod phone. I had to un-root and install Android GPE. It's not really AT&T anymore. Now I can download OTA updates, but cannot install them because TWRP is still the bootloader. I would rather do the OTA updates since the phone is already stock-ish and resetting everything is only slightly preferable to stabbing my eye out.
Since I'm unlocked on marshmallow, it looks like I want the 6.12.1540.4 zip.

mortifyxda said:
I didn't realize that I could pull the bootloader out of the firmware.zip.
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Click to collapse
Recovery and bootloader are two completely different things! You can pull recovery.img from firmware.zip, and flash with fastboot. I would not do this with bootloader, which would require s-off (to flash manually) and it would still be risky. Better to flash the whole firmware.zip or RUU, if you want to update bootloader. But I don't think that is what you meant.
mortifyxda said:
I had to un-root and install Android GPE. It's not really AT&T anymore. Now I can download OTA updates, but cannot install them because TWRP is still the bootloader. I would rather do the OTA updates since the phone is already stock-ish and resetting everything is only slightly preferable to stabbing my eye out.
Since I'm unlocked on marshmallow, it looks like I want the 6.12.1540.4 zip.
Click to expand...
Click to collapse
Your description is confusing, and I think you're mixing the terms up again. 6.12.1540.4 is the version number for the US Developer's Edition, which is Sense, and not the same as Google Play Edition (GPE) which is not Sense.
To OTA, the version number of the current stock ROM needs to match your firmware number (in bootloader and getar all), and you also need matching stock recovery.
To be clear, what is the current ROM (and version number) as shown in Settings? And also do fastboot getvar all, and post the result (delete IMEI and serial number). Need those pieces of info, before I can properly advise what stock recovery to use.

Related

Question about flashing firmware

I'm fairly new to the rooting and flashing scene and had a quick question about firmware.
I'm currently running Dirty Unicorns 9/26 official build with furnace kernel 1.0.9. I wanted to try arhd 20.1, so I made a backup, factory wiped and flashed it. I went thru the aroma installer and everything installed fine, once it finished, however, it turned off and wouldn't turn back on. I finally got it working again into the bootloader, but when I try and boot it, it just hangs on the HTC logo screen with the red text.
I browsed the thread to see what the issue could be, and although I couldn't find the someone else who had that problem, most of the problems people are having are because they didn't upgrade to the latest firmware.
So is that what the issue could've been? I downloaded the new firmware, just need to flash it, but before I do, I want to ask, will I have to flash a custom recovery again if I flash the new firmware? And will I also lose my data?
I'm soff with sunshine, twrp is my recovery
Probably due to outdated firmware, you are correct. Flashing a Sense ROM based on a newer version number (1.x, 2.x, 3.x) than your current firmware will often result in long boot time The phone probably will boot, just take a really long time (like 10 minutes) with no boot animation, making many folks think its "stuck" on the boot screen. Other issues are also common, such as broken WiFi.
Although, if you intend on flashing the firmware associated withe ARHD 20 (firmware 3.28) be aware that this is an "international" based firmware, and those are known to not play well with AT&T's network (at least for past 2.x firmware). You can give it a try, but you may have reception issues and may need to flash another firmware, or at least a different radio.
I know...I'm probably gonna kick myself for admitting I can't find the firmware version I'm on...but I can't...I'm on dirty unicorns as well...want to update firmware so I can try various Roms and I don't know which one to download...im still s-on but I know there's a thread that said I can still update...just can't find the number... any number that resembles the ones in many lists. I googled it but it doesn't tell me
rjcormier said:
I know...I'm probably gonna kick myself for admitting I can't find the firmware version I'm on...but I can't...I'm on dirty unicorns as well...want to update firmware so I can try various Roms and I don't know which one to download...im still s-on but I know there's a thread that said I can still update...just can't find the number... any number that resembles the ones in many lists. I googled it but it doesn't tell me
Click to expand...
Click to collapse
Your confusion is not without reason. There is in fact technically no "number" for firmware. That being the base, its been the normal thing here on XDA to refer to the software number which the firmware deployed with. So "firmware 3.28" actually just refers to the various modules (hboot, radio, recovery, kernel, WiFi, Bluetooth, and others) that deployed with the 3.28 OTA software. But the number 3.28 is just for the OS, which can easily be changed simply by flashing the ROM; while the firmware is actually not touched when you flash a ROM. In your case, since Dirty Unicorn is AOSP, its software number probably has nothing to do with HTC's software numbering scheme.
Best you can do is go by hboot and radio number. Either boot into bootloader, and get those numbers there and post them. Or adb getvar all (delete IMEI if you cut and paste the getvar output).
Wonders_Never_Cease has all the recent AT&T firmwares posted here: http://forum.xda-developers.com/att-htc-one-m8/development/att-4-4-3-2-22-1540-3-debloated-sense-6-t2837365
But s-off is required to update firmware manually. If you want to stay s-on and update firmware, your alternative is to return to stock ROM and recovery, and OTA to update the firmware. Or relock the bootloader and RUU. Either way, 2.23 is the latest firmware/software you can update this way, until AT&T officially rolls out 3.xx.
Your confusion is not without reason. There is in fact technically no "number" for firmware. That being the base, its been the normal thing here on XDA to refer to the software number which the firmware deployed with. So "firmware 3.28" actually just refers to the various modules (hboot, radio, recovery, kernel, WiFi, Bluetooth, and others) that deployed with the 3.28 OTA software. But the number 3.28 is just for the OS, which can easily be changed simply by flashing the ROM; while the firmware is actually not touched when you flash a ROM. In your case, since Dirty Unicorn is AOSP, its software number probably has nothing to do with HTC's software numbering scheme.
Best you can do is go by hboot and radio number. Either boot into bootloader, and get those numbers there and post them. Or adb getvar all (delete IMEI if you cut and paste the getvar output).
Wonders_Never_Cease has all the recent AT&T firmwares posted here: http://forum.xda-developers.com/att...-4-4-3-2-22-1540-3-debloated-sense-6-t2837365
But s-off is required to update firmware manually. If you want to stay s-on and update firmware, your alternative is to return to stock ROM and recovery, and OTA to update the firmware. Or relock the bootloader and RUU. Either way, 2.23 is the latest firmware/software you can update this way, until AT&T officially rolls out 3.xx.
Click to expand...
Click to collapse
Thank you! Soo hboot is 3.16.0.0000, and radio is 1.16.21331931
rjcormier said:
Thank you! Soo hboot is 3.16.0.0000, and radio is 1.16.21331931
Click to expand...
Click to collapse
I believe those are the hboot and radio numbers that go with the 1.58 software. You can update to 2.23 firmware by RUU (the OTA was actually pulled/cancelled). But that means you will only be able to run custom ROMs based on Sense software 2.x. The newer ROMs are based on Sense software 3.x. So if you want to run those, you either need to S-off, or wait until AT&T releases 3.x.
redpoint73 said:
I believe those are the hboot and radio numbers that go with the 1.58 software. You can update to 2.23 firmware by RUU (the OTA was actually pulled/cancelled). But that means you will only be able to run custom ROMs based on Sense software 2.x. The newer ROMs are based on Sense software 3.x. So if you want to run those, you either need to S-off, or wait until AT&T releases 3.x.
Click to expand...
Click to collapse
OK thank you for your help!

[Q] Looking for Stock Recovery 1.58 to do OTA and Have Quick Questions

FOUND THE RECOVERY (See below)
Right now my goal is to go back to stock to flash the OTA Update. I am running my nandroid back up I first made when which is the 4.4.4 w/ Software # 1.58.502.1. and right now I have TWRP as my recovery.
Also can someone confirm something for me. This nandroid I am running is rooted obviously and has SuperUser on it. If I go back to the stock recovery can I still do the OTA update even though SuperUser is there and the phone is unlocked?
Also in order to get the stock recovery back on the phone I need to use ABD and the windows command prompt method correct?
Thanks
found this link and was able to find the stock recovery finally. I clicked "Non-WWE- Recovery Images" Ten on the site it opens I clicked the more recoveries folder at the top and 1.58.502.1 was the first one.
http://forum.xda-developers.com/showthread.php?t=2701376
Now the only thing I need to know is if going back to stock recovery will allow me to update to OTA even though there is SuperUser on my device and even though I am rooted and unlock (S-on)
magicbumm328 said:
found this link and was able to find the stock recovery finally. I clicked "Non-WWE- Recovery Images" Ten on the site it opens I clicked the more recoveries folder at the top and 1.58.502.1 was the first one.
http://forum.xda-developers.com/showthread.php?t=2701376
Now the only thing I need to know is if going back to stock recovery will allow me to update to OTA even though there is SuperUser on my device and even though I am rooted and unlock (S-on)
Click to expand...
Click to collapse
As long as the ROM is stock (nothing modified by root) and stock recovery, you can update by OTA (root okay, unlocked bootloader okay).
Another option, just relock the bootloader and run the 4.4.4 RUU. It saves you from all the hassle (finding stock ROM and stock recovery), plus installing 2 OTAs. Only reason to do it the way you are, is to keep user data (RUU wipes phone) and it also saves you from having to relock.
redpoint73 said:
As long as the ROM is stock (nothing modified by root) and stock recovery, you can update by OTA (root okay, unlocked bootloader okay).
Another option, just relock the bootloader and run the 4.4.4 RUU. It saves you from all the hassle (finding stock ROM and stock recovery), plus installing 2 OTAs. Only reason to do it the way you are, is to keep user data (RUU wipes phone) and it also saves you from having to relock.
Click to expand...
Click to collapse
Well I do have the stock ROM. Idk if it having super user on it counts as being modified by root though? If not then its fine. And as mentioned I found the stock recovery as well.
The only reason I was looking to do it this way was because I do not really know what RUU is or how to do any of it. Idk how difficult it would be to relock the boot loader then figure out the RUU thing. Idk what the differences are between that and my phone being rooted as it is now are. I'll have to see if there is a thread that explains this RUU thing to me.
Thanks for the help and suggestion too btw
magicbumm328 said:
Well I do have the stock ROM. Idk if it having super user on it counts as being modified by root though? If not then its fine.
Click to expand...
Click to collapse
SuperUser is same as root, and is fine.
When I say "modifed by root" that often is when a user deletes "bloatware" they don't want, or adds apps, or modifies apps in the system partition.
If you didn't explicitly do any of those things, you should be fine. You will know this is the problem when you install the OTA, as the install will fail with the error message that the "system has been modified".
magicbumm328 said:
The only reason I was looking to do it this way was because I do not really know what RUU is or how to do any of it. Idk how difficult it would be to relock the boot loader then figure out the RUU thing. Idk what the differences are between that and my phone being rooted as it is now are. I'll have to see if there is a thread that explains this RUU thing to me.
Click to expand...
Click to collapse
RUU = ROM update utility
RUU is super easy, you don't really need much guidance to use it. LOCKED or RELOCKED bootloader is required to run it (UNLOCKED if okay if you have s-off). PC required, and the RUU will wipe the phone (so backup any personal data you want to keep, into your PC, cloud, etc.). Aside from those points, RUU is a self-explanatory executable (.exe) program that runs from your PC, and simple to use.
Relocking the bootloader is accomplished easily with a single fastboot command (after connecting phone to PC and booting into fastboot mode): fastboot oem lock
This is also assuming you did the bootloader unlock yourself, and therefore have fastboot/adb setup on your computer.
Running the RUU itself (after relocking the bootloader) is very easy. Boot into OS (some folks have better success being booted into fastboot mode, but I think the RUU is designed to run when booted into OS), connect to PC, then just run the RUU executable on your PC. The RUU executable will then just guide you what you need to do. Its mostly automated, you just need to confirm a few dialogue screens, etc. The RUU will reboot the phone a couple times, install the needed files automatically, and that's really it.
However, since you seem confidant you already have a stock ROM and corresponding stock recovery, I suppose the RUU doesn't gain you too much. But if you hadn't done those steps already, it often saves folks the hassle of tracking down the right stock ROM and recovery for their CID and current firmware. RUU in my opinion is a cleaner install, as it installs a complete stock image (not just updating piecemeal, like an OTA often does).
Also, since OTAs typically need to be installed in sequence, you will probably need to OTA to 2.23 software, than another OTA to 3.42 software. As RUU is a complete image, it would get you to 3.42 software in one fell swoop.
One other thing to note, is that if you are for some reason not connected to AT&T's network (using another carrier, another country, etc.) you will not get any OTAs on the AT&T branded device. AT&T oddity here, most other version will still OTA, even when not connected to a specific carrier. In contrast the AT&T RUU is able to be downloaded and run by anyone with an internet connection and PC (regardless of country, carrier, etc.). I'm under the assumption that most folks on this forum section are on AT&T's network, although I know that some are not (you haven't stated either way).
RUU links are included on my Index thread under heading "RUUs": http://forum.xda-developers.com/showthread.php?t=2751432
Aside from wiping the phone (OTA keeps user data, but you may end up wiping anyway if you run into bugs after OTA), the other downside to RUU is that you need to relock the bootloader. Then you need to unlock the bootloader again (via the HTCDev.com site, or alternately sunshine) if you want to install custom recovery, install custom ROMs, root, etc.
So the choice is really yours (RUU versus OTA). I'm just giving it as an alternative.

just a conformation before updating

Okay since my phone is my baby I just want to make sure I got the steps right to upgrade from 4.4.4 skydragon gpw to 5.x skydragon gpe.
1. upgrade firmware
Curent setup:
s-off
CID__001
HBOOT-3.16
planning to use this RUU (do i have to go through htc to unlock again?)
2. reinstall twrp
htconem8gsm right?
3. flash skydragon here
4. install elementalx (also do i have to buy the kernel manager again?)
Again I just want some one else's eyes to look at what i'm going to do to make this a smooth as possible.
1) Not sure how you came up with the notion that RUU is the one you want. But its wrong, and will just put you on the same firmware (1.x, hboot 3.16) you presently have. The latest AT&T RUU is number 4.28.502 (Android 5.0.2) which you can find linked on my Index thread: http://forum.xda-developers.com/showthread.php?t=2751432
Since you are s-off, there is no need to relock the bootloader to RUU (this is only needed when s-on). And its also not recommended to relock the bootloader in this situation (just makes more work and more steps for yourself for no good reason and with no added benefit).
2) Correct. You will also want the latest version TWRP 2.8.7. Anything older than the last few versions will not work on Lollipop firmware.
3) Yes
4) I haven't used that kernel. But as long as you've checked that its compatible with the ROM, then its fine. The ElementalX thread says it supports GPE 5.1, so it should be fine, I think.
Also don't use Kernel Manager, so I don't know. Is that a Play Store purchase, an in-app purchase, or otherwise?
redpoint73 said:
1) Not sure how you came up with the notion that RUU is the one you want. But its wrong, and will just put you on the same firmware (1.x, hboot 3.16) you presently have. The latest AT&T RUU is number 4.28.502 (Android 5.0.2) which you can find linked on my Index thread: http://forum.xda-developers.com/showthread.php?t=2751432
Since you are s-off, there is no need to relock the bootloader to RUU (this is only needed when s-on). And its also not recommended to relock the bootloader in this situation (just makes more work and more steps for yourself for no good reason and with no added benefit).
2) Correct. You will also want the latest version TWRP 2.8.7. Anything older than the last few versions will not work on Lollipop firmware.
3) Yes
4) I haven't used that kernel. But as long as you've checked that its compatible with the ROM, then its fine. The ElementalX thread says it supports GPE 5.1, so it should be fine, I think.
Also don't use Kernel Manager, so I don't know. Is that a Play Store purchase, an in-app purchase, or otherwise?
Click to expand...
Click to collapse
okay thank you it was mainly the firmware stuff, again thanks.

"Unfortunately, AT&T Ready2Go has stopped." Is stuck looping on my phone.

"Unfortunately, AT&T Ready2Go has stopped." Is stuck looping on my phone.
About a year ago I rooted my phone, following these directions. (I can't yet post a link, but the first option on google when searching "how to root m8" is the site, htconeroot.com, that I used.)
This morning I noticed that my phone was not vibrating anymore no matter if I restarted the phone or what settings were applied. So I checked online to see if there was a fix, and a factory reset was recommended.
So when I got back from work today, I thought I had successfully uninstalled the root using SuperSU. Then I performed a factory reset. My phone then went into TWRP recovery which was alarming. So I rebooted the system from TWRP , then the message in the title kept popping up over and over again, so I am in a bit of a pickle. I can message and call at the moment but that is about it.
I'm thinking the problem is similar to this one someone had on a note 3, except I was trying to factory reset rather than update. http://forum.xda-developers.com/showthread.php?t=2663120
Has this happened to anyone else, and do you have any suggested fixes for resetting this phone???
Thanks in advance.
I've seen a number of cases on the M8 forums of various processes stopping with message "XXX has stopped" after a factory reset. Not sure what is causing this. But there are a variety of ways to recover.
Since you have TWRP, you can try to restore a TWRP backup of your own (if you made one) or install a stockish ROM. Those methods may be helpful if you want to retain or retrieve any personal data.
Otherwise, relock the bootloader and RUU back to full stock (RUU will wipe the phone).
redpoint73 said:
Otherwise, relock the bootloader and RUU back to full stock (RUU will wipe the phone).
Click to expand...
Click to collapse
Honestly I'd be fine returning to full stock, at least for the time being, to see if the vibration problem would fix itself. But do I need to be S-OFF for RUU?
eaflook said:
But do I need to be S-OFF for RUU?
Click to expand...
Click to collapse
No, and I wish folks would stop saying you need s-off to RUU (not you, but I assume you got this notion from another post/thread).
You can run the an RUU made for the AT&T M8, as long as you aren't "downgrading" to a previous version (such as Lollipop to Kitkat). For that, you need s-off; or to change the CID and run another carrier version RUU.
You do need to relock the bootloader to run RUU while s-on, with command: fastboot oem lock
Are you currently on LP or MM (what does it say for OS number on the bootloader screen)?
redpoint73 said:
No, and I wish folks would stop saying you need s-off to RUU (not you, but I assume you got this notion from another post/thread).
You can run the an RUU made for the AT&T M8, as long as you aren't "downgrading" to a previous version (such as Lollipop to Kitkat). For that, you need s-off; or to change the CID and run another carrier version RUU.
You do need to relock the bootloader to run RUU while s-on, with command: fastboot oem lock
Are you currently on LP or MM (what does it say for OS number on the bootloader screen)?
Click to expand...
Click to collapse
Um... the OS line on the bootloader screen looks blank, unless I'm looking in the wrong place.
Should I do this? http://forum.xda-developers.com/htc-one-m8/help/guide-how-to-solve-soft-brick-phone-t2824193
eaflook said:
Um... the OS line on the bootloader screen looks blank, unless I'm looking in the wrong place.
Click to expand...
Click to collapse
No, you're looking in the right place. Its somewhat common for OS number to be blank, its a known bug in older TWRP versions that it deletes the OS number.
What does it say for hboot number and radio number?
If the phone still on the stock ROM you originally rooted on? If so, is it Lollipop, Kitkat, etc.?
eaflook said:
U
Should I do this? http://forum.xda-developers.com/htc-one-m8/help/guide-how-to-solve-soft-brick-phone-t2824193
Click to expand...
Click to collapse
You can do that. All that "guide" describes is one way to get a ROM on an SD and flash it, which is one of the options I already suggested in Post #2 above.
But what ROM will work, somewhat depends on the info I requested above.
redpoint73 said:
What does it say for hboot number and radio number?
Click to expand...
Click to collapse
hboot number-3.19.0.0000
radio [email protected]
redpoint73 said:
If the phone still on the stock ROM you originally rooted on? If so, is it Lollipop, Kitkat, etc.?
Click to expand...
Click to collapse
Yes it is still on the stock root ROM. I am running Lollipop 5.0.2.
eaflook said:
hboot number-3.19.0.0000
radio [email protected]
Yes it is still on the stock root ROM. I am running Lollipop 5.0.2.
Click to expand...
Click to collapse
You should be fine flashing most any ROM on the AT&T or "international" M8 development forums. Just avoid other dev sections for variants, such as the Sprint or Verizon dev sections.
Before flashing a ROM, you may want to update your TWRP version to 3.0.whatever.
Although I have to admit, I'm still on TWRP 2.8.4, and its worked fine flashing LP and MM custom ROMs. Any older than 2.8.something may cause issues.
Alternately, relock bootloader and run RUU 4.28.502.2 (Lollipop). If you want to run the Marshmallow RUU (6.20.502.5), you'll need to flash the MM firmware first, then RUU. Link that describes that process, as well as all ATT RUUs is on my Index thread: http://forum.xda-developers.com/showthread.php?t=2751432
redpoint73 said:
You should be fine flashing most any ROM on the AT&T or "international" M8 development forums. Just avoid other dev sections for variants, such as the Sprint or Verizon dev sections.
Before flashing a ROM, you may want to update your TWRP version to 3.0.whatever.
Although I have to admit, I'm still on TWRP 2.8.4, and its worked fine flashing LP and MM custom ROMs. Any older than 2.8.something may cause issues.
Alternately, relock bootloader and run RUU 4.28.502.2 (Lollipop). If you want to run the Marshmallow RUU (6.20.502.5), you'll need to flash the MM firmware first, then RUU. Link that describes that process, as well as all ATT RUUs is on my Index thread: http://forum.xda-developers.com/showthread.php?t=2751432
Click to expand...
Click to collapse
Do you know how I might update TWRP from 2.7.0.2?-----Nevermind, I got it.
eaflook said:
Do you know how I might update TWRP from 2.7.0.2?-----Nevermind, I got it.
Click to expand...
Click to collapse
Good practice is to post what you did (or going to do) for the benefit of others that may have the same question; or so we can verify you are on the right track.
In case others may have the same question (or you get stuck again), all TWRP versions, and instructions (recommend install with fastboot method) are here: https://twrp.me/devices/htconem8gsm.html

Upgrading Software Issue.

Software up to date issue
HI all, just got this M8 and it is an ATT Version. but I believe it is unlocked because I am using it with cricket.
When trying to update Android Tells me software is up to date ?
Android version 5.0.2
HTC Sense Version 6.0
Software Number 4.28.502.1
HTC SDK API Level
I am pretty sure that ATT has updated to Marshmallow by now / So why can't I update? I am on wifi and 4G/LTE Could it be because I am using a Cricket Sim Card in the Phone ?
I have downloaded the RUU for Marshmallow software version 6.20.502.5. Should I continue with the Manual update ?
I believe this phone was originally purchased from ATT on May of 2016 if it makes any difference , figured I post it. since it could be a newer version of HTC M8.
Also is there a way to back up my current stock rom, without Rooting phone ? Thanks for all your help.
As I cannot root my phone, because when I go into developer option and search for S-off That option is not there and I can't Continue.
My responses below in red font:
ELEVO said:
HI all, just got this M8 and it is an ATT Version. but I believe it is unlocked because I am using it with cricket.
When trying to update Android Tells me software is up to date ?
I am pretty sure that ATT has updated to Marshmallow by now / So why can't I update? I am on wifi and 4G/LTE Could it be because I am using a Cricket Sim Card in the Phone ?
That is correct, the AT&t version (and most US versions) can only OTA update if connected to the proper branded carrier (AT&T in this case). Therefore, the RUU is your best option to update.
I have downloaded the RUU for Marshmallow software version 6.20.502.5. Should I continue with the Manual update ?
You can. But you need to flash the 6.20.502.5 firmware first, before you can flash the RUU. See instructions to flash the firmware here: https://forum.xda-developers.com/showpost.php?p=67123738&postcount=7
Then run the RUU. Keep in mind, that RUU will wipe the phone. So backup your data to an off-phone location (cloud, computer, etc.) before RUU.
Also is there a way to back up my current stock rom, without Rooting phone ? The current Lollipop ROM? No, there will be no way to revert to LP by official means, once you RUU to Marshmallow. I doubt you will find the need or desire to "downgrade" to obsolete LP version. If for some reason you did want to, there are options, but would require unlocking the bootloader (to install custom recovery and flash a Lollipop ROM), or s-off (which would allow you to "downgrade" by RUU - which is not allowed with s-on).
As I cannot root my phone, because when I go into developer option and search for S-off That option is not there and I can't Continue.
You are misunderstanding a couple things:
1) s-off is not a setting in Developer Options. s-off can only be obtained with sunshine app ($25)
2) You don't need s-off to root this device. Simply unlock the bootloader, install TWRP, and flash SuperSU to root
Click to expand...
Click to collapse
Detailed
redpoint73 said:
My responses below in red font:
Click to expand...
Click to collapse
Thanks for the detailed reply, really helpful and greatly appreciated :good:
Two more Questions, Can I upgrade to an official DEV Edition RUU on this ATT Device? or would I have to use a Custom Dev ROM ? as I am trying to Tether with my phone, just like my official Developer HTC M8 I purchased in 2014 , Seems AT&T phone wont allow me to Tether ?
Also once I flash firmware and upgrade to official RUU will need to Unlock and Root Loader? Will doing upgrading to official Marshmallow Relock bootloader and Un Root Phone ? Back to Stock ? Thanks again, I will be attempting this pretty soon. Thanks again
For the Record, I have made a back up of my Lollipop via TWRK. I also backed it up using Titanium back up, just in case.
Again, my responses in red font:
ELEVO said:
Thanks for the detailed reply, really helpful and greatly appreciated :good:
You're welcome. Always happy to help!
Two more Questions, Can I upgrade to an official DEV Edition RUU on this ATT Device?
You can't flash the Dev Edition RUU with s-on. Even though the versions are very similar (same model ID - MID) the two versions have different carrier ID (CID). Wrong carrier ID will make the Dev Ed RUU fail, by definition. And the only way to change CID is with s-off. Further, its not really necessary to flash the Dev Ed RUU (and not worth spending money of s-off) to accomplish what you want (see more below)
or would I have to use a Custom Dev ROM ? as I am trying to Tether with my phone, just like my official Developer HTC M8 I purchased in 2014 , Seems AT&T phone wont allow me to Tether ?
Its correct that the AT&T stock ROM disables tethering. Flashing most custom ROMs (or the Dev Ed ROM) will enable tethering - as well as remove annoying AT&T branding and bloat apps. Flashing the Dev Ed RUU is not necessary to accomplish this.
Also once I flash firmware and upgrade to official RUU will need to Unlock and Root Loader? Will doing upgrading to official Marshmallow Relock bootloader and Un Root Phone ? Back to Stock ? Thanks again, I will be attempting this pretty soon. Thanks again
You need to relock the bootloader in order to flash firmware and RUU (command: fastboot oem lock). Once the RUU is complete, the phone will be on a fully stock "factory" image. So you will be unrooted. You will also be back to stock recovery (no longer have TWRP installed). From there, what you want to do:
1) Unlock the bootloader again. Either use the same unlock bin code you used to unlock BL before. Or get a new code from HTCDev.com
2) Flash TWRP back to the phone with fastboot. TWRP 3.0.2 is recommended for compatibility with MM firmware.
3) Flash the desired custom ROM. The custom ROM will be rooted (if you flash the Dev Ed ROM, you can select root in the AROMA installer).
For the Record, I have made a back up of my Lollipop via TWRK. I also backed it up using Titanium back up, just in case.
Always good to make backups. Although be aware, that RUU will wipe the phone, including internal storage. So if you picked internal storage as your backup location, you'll want to move/copy to another location (removable SD is okay, otherwise to computer or cloud).
Also note that restoring app data (as well as call logs, SMS) using Titanium, after RUU or ROM flash should be okay. But don't restore any system data, as this can cause problems.
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Click to collapse
redpoint73 said:
Again, my responses in red font:
Click to expand...
Click to collapse
Ok i came back to this old post. I forgot all about it, it really is helping me alot.
My questioin is after i Relock the bootloader can i do a factory wipe? will this remove everything from my phone and bring it back to stock?
I relocked my phone, but all my apps and contacts are their.
Bricked ?
ELEVO said:
Ok i came back to this old post. I forgot all about it, it really is helping me alot.
My questioin is after i Relock the bootloader can i do a factory wipe? will this remove everything from my phone and bring it back to stock?
I relocked my phone, but all my apps and contacts are their.
Click to expand...
Click to collapse
I think i may have bricked my phone? I went and installed an RUU firmware file for Marshmallow as most instruct to do via Fastboot. All went well, installation completed and i was able to send command to phone to reboot. when it tried to reboot. white screen with HTC Comes on and then goes almost black with a very light dark grey background.
Phone would not reboot into anything but dark screen. even when i restarted it with power button. the only thing that worked for me, was Holding Down Power/Volume and quickly hit the volume down button before device would vibrate to reboot, that took me into recovery. Below is what i see in Recovery.
Phone now has new software
***RELOCKED***
m8_UL_CA PVT SHIP S-ON
HBOOT-3.1.0.0000
RADIO-4.0 [email protected]
OpenDSP-V56.2.2-00593-M8974_FO.0126
0S-6.20.502.5
eMMC-boot 2048MB
APR 14 2016,19:39:46.0
HBOOT
<Vol UP> to previous item
<Vol Down> to next item
<Power> to select item
FASTBOOT
RECOVERY
FACTORY RESET
SIMLOCK
CHECK SMARTSD
IMAGE CRC
SHOW BARCODE
I was able to run and "IMAGE CRC" via boot loader. it gave me alot of numbers after calculating. not sure if that is a good sign ?
Things I've tried in Recovery.
1. Recovery goes back to black screen.
2. SHOW BARCODE Works- 3 bar codes showed up.
3. Fastboot works. but when i try command "adb devices" it says list of devices attached. but nothing shows up
4. Tried to do a factory reset and tries to do it, then a black phone pops up on screen with green arrow sgoing in circles for like 10 seconds. then reboots to dark screen.
Please Help :crying: Thanks
Can anyone help me with this? I bought the phone with me on vacation and now using an HTC Developer Edition that the button down doesn't work and Volume down button us sunk in But at least i have my phone with all my contacts and apps , For now ?
I would like to know if i can unbrick my other HTC . Thanks.
Late in responding, as I was on work travel myself, and not on XDA for over a week.
ELEVO said:
I think i may have bricked my phone?
Click to expand...
Click to collapse
It's basically impossible for you to do anything with an s-on M8 that will actually brick it. That is the good thing about s-on.
ELEVO said:
I went and installed an RUU firmware file for Marshmallow as most instruct to do via Fastboot. All went well, installation completed and i was able to send command to phone to reboot. when it tried to reboot. white screen with HTC Comes on and then goes almost black with a very light dark grey background.
Click to expand...
Click to collapse
I think you only flashed the firmware.zip and not the RUU. Based on the condition here, and your other thread you created here: https://forum.xda-developers.com/htc-one-m8/help/htc-one-e-m8-fastboot-issues-t3757628
I clearly described above to flash the firmware.zip then the RUU. They are 2 completely different things. Firmware is about 80 MB and only contains hboot, radio, and a few other things. RUU is a full image that is 1.5 GB.
No boot after flashing signed firmware is normal, as it expects the RUU to be run afterwards.
ELEVO said:
Fastboot works. but when i try command "adb devices" it says list of devices attached. but nothing shows up
Click to expand...
Click to collapse
adb doesn't work in fastboot mode. Only fastboot commands will work in fastboot mode. You can only use adb when booted to OS (not an option for you, obviously) or alternately in custom recovery TWRP. So what you describe (adb not working) is normal and expected.
However, fastboot is enough to get the phone working from the described condition.

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