Removing Retail Mode from P20 Lite - Huawei P20 Lite Questions & Answers

I am not technically inept, but am extremely nooby when it comes to anything android and I have not been able to find the answer via the internet so far so hoping someone can help.
I bought a P20 Lite from work as it was ex display and extremely cheap. It is locked into retail mode. In Settings>Apps>Retail Demo I can see 'Disable' lit up but when I tap on it, and then 'Deactivate and Uninstall' and Ok it I immediately get a notification from pull down from Package Installer that uninstalling Retail Demo was unsuccessful.
That is about as far as my android head will take me so Im stumped. Have seen lots of youtube videos but they relate to different models and I suspect each phone will be very different.
I don't want to try anything random as I cocked up a Samsung last year when I removed part of the demo without doing other steps first.
Really hoping someone can help as I want to get the phone to factory new status to give to my dad for Christmas.

Related

[Q] Stuck at boot "Password Failure"? Please advices

Hi everyone, I've been lurking around here unregistered since I got my first Android device last year, namely the ZTE Blade.
Now however, I'd love to get help because somehow I've managed to make my brand-new tablet not to boot, and I seek expertise from the experts.
I've searched around both Google and here on XDA, but haven't found anything because I don't know how to search for it, due to the fact that the error is in Chinese.
So to make a story short I just arrived today from a trip in HongKong.
I was very pleased with my ZTE Blade so I decided I'd buy a cheap Android-running tablet during my stay, and so I did.
I got myself an "Acho C908", which I tested in the store first. May be an unknown brand, but it's a really nice tablet.
It sure has nice specifications and I was pleased with the performance for the price I payed, however I managed to make things worse.
Everything was going good except I couldn't install any apps in Playstore, I always got the “Error Processing Purchase DF-BPA-09″. So I searched this error up and found the guide: ...technipages.com/google-play-error-processing-purchase.html
I followed the guide and cleared the data from Google Services Framework. However, after doing so things got bad. My tablet began to freeze so I restarted it. After it booted the "explorer" (forgot the name in Android, refering to Windows-term) didn't answer and crashed and the tablet froze again.
So I rebooted it again and here's where I got stuck.
The thing is that I don't seem to have bricked my tablet, because I'm able to pass the boot logo, however I'm getting stuck at something else. The worse thing is that because of the tablet being a Chinese one, the text is in Chinese! However, this happened to me at the airport when I was heading back from HongKong so I managed to ask some Chinese people.
Here's the "error".
XXX.img692.imageshack.us/img692/4594/tableth.jpg
(please replace the XXX with WWW)
From what the Chinese people I asked told me, it says something about "Password Failure" and that I would need to "Reset to Default Settings"?
I have tried to enter some sort of Factory Settings/Hard Reset mode, but holding Volume+ or Volume- or both together during turn on of the device yielded nothing but getting stuck at the first logo during start-up, namely "ACHO".
So do you have any guesses on what to do?
I actually bought two of these tablets, one for me and one for my father. So if there's any information on the working tablet you would need to help me, I would be able to provide you with that.
I'd love to get my new tablet working.
Thank you very much in advance.
Best Regards
Nikkop
acho c98
nikkop said:
Hi everyone, I've been lurking around here unregistered since I got my first Android device last year, namely the ZTE Blade.
Now however, I'd love to get help because somehow I've managed to make my brand-new tablet not to boot, and I seek expertise from the experts.
I've searched around both Google and here on XDA, but haven't found anything because I don't know how to search for it, due to the fact that the error is in Chinese.
So to make a story short I just arrived today from a trip in HongKong.
I was very pleased with my ZTE Blade so I decided I'd buy a cheap Android-running tablet during my stay, and so I did.
I got myself an "Acho C908", which I tested in the store first. May be an unknown brand, but it's a really nice tablet.
It sure has nice specifications and I was pleased with the performance for the price I payed, however I managed to make things worse.
Everything was going good except I couldn't install any apps in Playstore, I always got the “Error Processing Purchase DF-BPA-09″. So I searched this error up and found the guide: ...technipages.com/google-play-error-processing-purchase.html
I followed the guide and cleared the data from Google Services Framework. However, after doing so things got bad. My tablet began to freeze so I restarted it. After it booted the "explorer" (forgot the name in Android, refering to Windows-term) didn't answer and crashed and the tablet froze again.
So I rebooted it again and here's where I got stuck.
The thing is that I don't seem to have bricked my tablet, because I'm able to pass the boot logo, however I'm getting stuck at something else. The worse thing is that because of the tablet being a Chinese one, the text is in Chinese! However, this happened to me at the airport when I was heading back from HongKong so I managed to ask some Chinese people.
Here's the "error".
XXX.img692.imageshack.us/img692/4594/tableth.jpg
(please replace the XXX with WWW)
From what the Chinese people I asked told me, it says something about "Password Failure" and that I would need to "Reset to Default Settings"?
I have tried to enter some sort of Factory Settings/Hard Reset mode, but holding Volume+ or Volume- or both together during turn on of the device yielded nothing but getting stuck at the first logo during start-up, namely "ACHO".
So do you have any guesses on what to do?
I actually bought two of these tablets, one for me and one for my father. So if there's any information on the working tablet you would need to help me, I would be able to provide you with that.
I'd love to get my new tablet working.
Thank you very much in advance.
Best Regards
Nikkop
Click to expand...
Click to collapse
try to download the new firmware here:
http://www.acho.com/downc.asp?ID=3476
put it in sd card
boot the tablet in recovery mode (vol- and on)
launch "update frome external card
reboot
I don' remember al the steps: please read the istruction on achos site too, at the same link above
bye

[Q] New Here: Seeking Help w/ Rebooting S4's.

Hello:
So, the bottom line up front is I need help solving a problem with my now third, new Verizon Samsung Galaxy S4--it keeps restarting on its own, at random times, but most often after I lock the screen.
To go in more depth, if you think you may know the solution: I purchased the S4 when it first came out, some time in 2013 (not sure specifically, but it was new) and it worked just fine for 13 months (1 month past the warranty of course); this was back in August, when I got the latest Android update pushed to my phone from Verizon (4.4.2). A couple of weeks later, I would occasionally get overheating warnings that would very quickly disappear (like within a few seconds), and then the device started restarting itself... I cannot predict when it will restart, it's random, but like I said above, it usually happens most right after I lock the screen by pressing the right side button once. I started looking around on the internet for a solution then, but only found a couple of videos from earlier in 2013 where people were having battery problems (Google search has been letting me down more and more as the years pass). One day while at work, I was listening to Pandora as I always have with the phone in my front pocket, as I always have. A few hours later when I got home, not having taken the phone out of my front pocket since those last few hours at work, I went to answer a text message I had received; when I unlocked the phone, the screen was black, except for a small bit of white showing through some cracks UNDER the LCD, UNDER the screen protector, INSIDE my Otterbox Defender... the phone appeared to be working still, but the screen and touch screen did not. At that point I was pretty damn irritated and tried to find answers for a week with no luck... I called Verizon, they sent me on a goose chase to Samsung, who sent me back to Verizon, who got me in a conference call with Samsung and then left the call, and then Samsung ultimately said I would need to pay for repairs to the phone... SO... I went back to Verizon who again said I would have to talk to Samsung, but instead I just settled to giving Asurion (my phone insurance through Verizon, whom I pay an extra $9 monthly) $99 as a deductible to get a replacement S4...
Two days later I receive a brand new S4... spend hours setting it up the way I had my prior one... wasting tons of my valueable time to do so and bandwidth from my Concast ISP and the data cap they've decided to give us... one week later, the phone starts restarting itself... and this one did it more often than my prior one... EVERYTHING is up to date, minus a good amount of useless bloatware apps I never use from Samsung, like "Watch On," which I ignore... but everything necessary, I update. So, I go back to Asurion, who quickly ships me a 3rd S4...
Two days later I receive that third, brand new S4... spend hours setting it up the way I had my prior one... and now, this one is also restarting itself randomly. Interestingly, when I visited family for Thanksgiving, it restarted itself over and over and over much more frequently than when I'm at my place... at my family's place, they have very poor reception, and my phone usually has to work more to try to get the signal... IDK what the deal is, but maybe that information can be helpful to y'all.
Other things to note:
1) When I check the "RAM manager" by holding down the home button and then choosing "Task Manager", the phone is always using at least 800MB of 1.77GB of RAM... even when I choose "Clear memory" and it tells me 30 something apps have been closed... it jumps right back up to 800-900MB of usage.
2) I've tried factory resets on all three phones; with the first one where the screen cracked inside, I hooked the phone up via HDMI... within a couple of days, the restarting begins.
3) With the first replacement I received, I could not sent text messages with the default messenger app... and shortly after trying, it would restart.
4) I have used the same SIM card with all three phones since the issue began, when I first got the 4.2.2 update... I do not suspect the SIM card is the problem, but I'm also not savy with the phone... I know my way around it, but I'm not in the know.
5) I thought maybe it started because of some apps I had been trying, so I had deleted them, and the problem still persists.
6) I constantly have a Pebble Bluetooth smart watch connected to the phone... I have since I got it last Spring (2014).
7) I have never rooted the S4, overclocked it, underclocked it, or modded it in anyway because I do not know how, and I was afraid of what could happen in the future with whatever ROM I did flash onto the device if Verizon tried to push an update to it... I just don't know anything about the whole process, and I'm assuming it requires a lot of know how and babysitting of the device... I just want it to work.
8) I've replaced the battery twice; it doesn't seem to be the problem.
9) I've cleared the cache through the boot manager thing gotten to by holding a combo of buttons on the device while it's rebooting... it did not help.
Edit: 10) Today while I was listening to Pandora in the car, the audio began to skip and scratch, and then it paused for a moment, and then the phone restarted itself.
11) I forgot to mention that the reboot process itself is very fast compared to a manual restart performed by me... the phone will go black, the Samsung color rings will show a second after that, the logo appears then, the screen flashes the red Verizon logo, and then the devices is ready to be used... it's less than 10 seconds.
I've been searching around on the internet for about two months now while dealing with the problem and I can't find anything useful. Does anyone here know what my issue is and how I can fix it? Is there a way to pull error logs / information from the S4 somehow to give to someone to diagnose, like DxDiags on PC? I don't know how to read that stuff myself, but I know it can be very useful... I just don't know how to find that info inside of these very locked down ****boxes we call smartphones...
I truly appreciate any help I can get--sorry I can't offer anything in return; if I can't find a solution, I'm just going to go to my backup phone from 2011 (Droid X), and I will definitely never purchase another Samsung device, especially after they blamed me as the cause of the problem without even seeing the phone...
Thanks.
The problem is with the NG6 software build, and "probably" not with your phone. Go to Settings>About Phone> and see what Baseband Version is on your phone. If the last 3 letters are NG6, that's probably the problem. There is a new OTA update (as of 12/1).....Baseband Version ending in NK1, which corrects the rebooting problem. Either install the new update, or go back to the NC5 baseband version and that should solve your problem. Both NK1 and NC5 can be rooted if you desire.

galaxy alpha issues

Hi everybody i am asking for advice on trying to repair a phone for a family member the phone is a galaxy alpha F variant UK stock rom, factory unlocked and unrooted the problem started after finishing a call the handset was left un attended and when it was later picked up the screen was black but does not appear broken aywhere and does not appear to respond to touch
i have tried un successfully to get it into recovery or download modes the handset turns on and the blue lights come on and you can hear the start up tone but see nothing on screen, it also charges and i have tried a new battery, odin does recognise a device but as i cant get it into download i cant flash a stock rom which i have already downloaded.
So my question is, is there any software that i can download to diagnose whether or not the screen is dead or whether it is a f/w issue or is there a way around this where i can use a different tool to get into the handset and flash a new stock rom in case the current f/w is corrupted
Thanks in advance for any useful help and advice
Please understand that i am a newb to this so if i have made some mistakes or my questions have been answered elsewhere previously i do apologise
I think it seems pretty obvious that the problem is the display itself
Hi BigHands,
I faced a problem having the exact same symptoms as yours twice in the last few month: screen was staying black but phone reacted to some "external" actions (ON/OFF), blue light.
Not sure what happened exactly, but removing the battery and trying to restart the phone finally brought the device back to life after trying more than than 10 times!!!
So in my case, the display was probably not the (only) root cause.
Really weird however that I needed to reboot the phone >10times to make it work: usually when software is screwed either one single power cycle will bring the device back to life or it will never power up again!
Anyways, a FW issue is still a possibility considering the number of bug this phone has (for the price it was sold, that phone is definitely the worse gadget I ever owned!)... But it seems there is a bunch of FW updates on going on this model accross the world, so there is still a little hope things might improve... Samsumg may have woken up; who knows...
JF

Please help me!!! If possible!?

Hi, I bought a ZTE K92 (AT&T Primetime) tablet new and unlocked on eBay back in June 2018 for $149 and did not open it up or turn it on/set it up till just yesterday (10/6/18) because of a move to a new residence and I kinda forgot about it since I do have quite a few other devices and it was packed up in boxes I just never got to unpacking until recently. Anyways... I was hoping for a good experience since it had received good reviews and seemed like it was a fairly high speced tab, it is a nice device, unfortunately, at&t screwed it up with A LOT of they're bloatware apps, one named as "device help" continually reloads an icon on the home screen EVERY time I unlock the home screen! I've removed it a kajillion times and tried like hell to disable it but it's greyed out, tried to remove at&t associated files through my file mgr, but to no avail since I don't have root access. BUT... These are minor problems!...
MOST DISAPPOINTING/DEPRESSING is that I have *thin black/grey (depending on the background colors being displayed) lines on the entire screen/display, in normal (vertical) view mode the lines are *horizontal*, in landscape mode the lines are *vertical*, AND... they pulse on/off at a steady rate , as if it was related to the clock but at a slower rate, approximately on for 2 seconds, then off for 2 seconds continuously.
It has done this since first starting the tablet up new out of the box!
I have searched hell and high water to find the cause and or a fix, I've tried apps for screen issues, I've tried restarting, I've tried YouTube videos on how to fix, but nothing has worked and what's worse is i have not been able to find ANYTHING related to my exact problem, only problems with flickering or colored lines on they're screens!
The closest thing I found in relation to my exact problem was certain screens made for Lenovo tabs/laptops, but I don't think the ZTE K92 tablet has the same display as those devices?!?
I have not done a factory reset or a partition wipe as I don't think it will solve the problem.
I DO NOT really want to take the tablet apart to mess with the screen ribbon cables!
It's running 7.1 nougat stock, and I have dev options enabled/on, I've tried different settings under drawing and hardware acceleration settings but it had no effect.
I was wondering if there's a way I could get the tablet back to marshmallow O.S. for a fix, but again, I don't think that would solve the problem, I'm pretty sure it's a hardware/setting or calibration issue.
I did not find or attempt any firmware updates as I'm worried if I do and it doesn't solve the problem, I might not be able to undo the update, and I'm a firm believer in NOT updating, a don't fix what ain't broke kinda thing, yeah I'm old school.
In my opinion, I think it is a screen digitizer issue and I honestly don't know if there is a fix for this AND if I could find a *qualified* technician to fix it!?
This is really very annoying and sucks!
Is there not a single sole through XDA that knows about this type of problem AND MORE IMPORTANTLY, does anyone know how to fix it!?
P L E A S E ! ! ! This is such a shame for this tablet as it is a really nice device.

Headache

Hello, I am one more carrier of an LG V60 although before it was Att, now it is no longer, it has identity problems.
My headache started a week ago when I found a guide on how to do crossflash on any device, I followed the steps but maybe I was wrong about something, I still don't know exactly what it was because I was following the steps until the computer (which didn't it's very slow) it got stuck and out of nowhere I erased all the vital partitions for the phone, when I saw that it didn't turn on I gave it up for dead and I had already stored it (with honors) in a broken cell phone drawer that I have (really, It was next to an HTC U Ultra, U11, an Iphone C and a box from a Xiaomi Redmi Note 4 that was stolen from me).
After a few hours a person answered me who said that he had managed to update an Att V60 to Android 11 but it was a very difficult motorcycle, well, I told him a little about the situation and he offered to help me, I am really grateful for the help, well I had already given up my LG for dead, but even with all the help it did not look very good, I spent many hours trying to revive it, at the end of 3 or 4 days it gave a sign of life, I threw the text of LG V60 ThinQ ( although without 5G, which is strange since I had it before) and then it had some red letters indicating that they had not been able to find the necessary documents for the boot, I kept looking until I found the solution (don't ask me how I did it, literally everything came out by following and joining steps and guides as if they were a puzzle) and I finally managed to install a KDZ and update.
Home, Android 11, keyboard and everything like new, seriously, I was filled with joy to see that everything had gone well, configure everything, install the applications that it would occupy and other things, at this point when I turned on I saw the battery 64%, I thought that it was time to move my stuff back to this phone (I have a spare V35) but after a while I noticed strange things, the first one was how hot the phone was, I thought it was because it was being turned on for the first time , Another thing I noticed was that the fingerprint sensor did not read my fingerprint (it is currently repaired) and that good among one of the things that were evident is that I had lost my Imei, I had found a person with a guide that said how to recover it but it didn't work, my QFil doesn't read the qcn I don't understand why.
When I thought that those days of headache were over and all I had to do was enjoy an excellent phone, it was not like that.
Problem list:
- Does not have imei
- Battery drains in a matter of 5 hours or less
-Fast charge missing
-It's always hot
-The CPU has about 4 cores always working at 100% for no reason, even when idle with the screen off and entering the safe mode the phone does not stop being just as hot or with the same workload
I really want you to help me, it's the only phone I've ever had so powerful and so TOP that I wouldn't want to let it die, besides that, I'm in college and the expenses are getting higher and higher and I don't have money to buy another or buy a second-hand one, I also live in latam (I also say this in case some of my words are not consistent, I know a little English and I am also studying but I still do not feel capable of formulating a whole text in English)
If anyone knows what I can do or what I can try to do I will really appreciate it, I really love this phone and I didn't want it to end like this, believe me I'm really sorry I tried to update
AngelED2000 said:
Hello, I am one more carrier of an LG V60 although before it was Att, now it is no longer, it has identity problems.
My headache started a week ago when I found a guide on how to do crossflash on any device, I followed the steps but maybe I was wrong about something, I still don't know exactly what it was because I was following the steps until the computer (which didn't it's very slow) it got stuck and out of nowhere I erased all the vital partitions for the phone, when I saw that it didn't turn on I gave it up for dead and I had already stored it (with honors) in a broken cell phone drawer that I have (really, It was next to an HTC U Ultra, U11, an Iphone C and a box from a Xiaomi Redmi Note 4 that was stolen from me).
After a few hours a person answered me who said that he had managed to update an Att V60 to Android 11 but it was a very difficult motorcycle, well, I told him a little about the situation and he offered to help me, I am really grateful for the help, well I had already given up my LG for dead, but even with all the help it did not look very good, I spent many hours trying to revive it, at the end of 3 or 4 days it gave a sign of life, I threw the text of LG V60 ThinQ ( although without 5G, which is strange since I had it before) and then it had some red letters indicating that they had not been able to find the necessary documents for the boot, I kept looking until I found the solution (don't ask me how I did it, literally everything came out by following and joining steps and guides as if they were a puzzle) and I finally managed to install a KDZ and update.
Home, Android 11, keyboard and everything like new, seriously, I was filled with joy to see that everything had gone well, configure everything, install the applications that it would occupy and other things, at this point when I turned on I saw the battery 64%, I thought that it was time to move my stuff back to this phone (I have a spare V35) but after a while I noticed strange things, the first one was how hot the phone was, I thought it was because it was being turned on for the first time , Another thing I noticed was that the fingerprint sensor did not read my fingerprint (it is currently repaired) and that good among one of the things that were evident is that I had lost my Imei, I had found a person with a guide that said how to recover it but it didn't work, my QFil doesn't read the qcn I don't understand why.
When I thought that those days of headache were over and all I had to do was enjoy an excellent phone, it was not like that.
Problem list:
- Does not have imei
- Battery drains in a matter of 5 hours or less
-Fast charge missing
-It's always hot
-The CPU has about 4 cores always working at 100% for no reason, even when idle with the screen off and entering the safe mode the phone does not stop being just as hot or with the same workload
I really want you to help me, it's the only phone I've ever had so powerful and so TOP that I wouldn't want to let it die, besides that, I'm in college and the expenses are getting higher and higher and I don't have money to buy another or buy a second-hand one, I also live in latam (I also say this in case some of my words are not consistent, I know a little English and I am also studying but I still do not feel capable of formulating a whole text in English)
If anyone knows what I can do or what I can try to do I will really appreciate it, I really love this phone and I didn't want it to end like this, believe me I'm really sorry I tried to update
Click to expand...
Click to collapse
UPDATE
I seem to have the original FTM, OP_a, OP_b, modem_a, modem_b, sid_a and sid_b files, in other words before the tragedy happened.
UPDATE 2
I think also abl_a and abl_b
Hello, I have the same problem with my LG v60, I know it's hot a lot, I know it ends Very quickly, the battery was erased, IMEI does not recognize a fingerprint, I have already flashed different versions from the original at t open Canada, European version and it is not solved, did you find any solution, any information on why the failure

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