Nougat - Decryption unsuccessful/failed - Lock screen related - Nexus 6P Q&A, Help & Troubleshooting

Encrypted 6P with Nougat here. A week after flashing the OTA, unlocking the phone with the initial pin code worked fine, but I started having problems unlocking the phone again by swiping. It just wouldn't be swiped out of the way. It became more and more difficult . Had to reboot all the time in order to get access to the phone, through the pin code unlock.
Initially reflashing the OTA and removing 'trusted locations' for smart unlock seemed to do the trick. 10 hours later the phone went into the same problematic lock screen mode again. This time without any trusted locations.
Installed an alternative lock screen to see if that would work. This required disabling the default lock screen...
After the next boot up, the phone says that the password was correct, but 'decryption was unsuccessful" and the data is corrupt. Will need to perform a factory reset.
Does anyone know a way to avoid resetting the phone? Flashing back to the latest Marshmallow did not help.
Thanks so much.

OK, for anyone else finding themselves in this situation: make sure you get your backups off the phone before it's too late.
After a factory reset to Nougat everything is fine, but all my stuff is gone.

Related

pattern passcode lockout issue

Hi all. had an issue while trying to load up LinageOS last night. Was having trouble with keeping root. Seem to have solved that by using Magisk 11.6 and the SUaddon rather than any superuser version.
Anyhow as part of this i went back to a TWRP backup of which i had 3 different versions (stock and lineage) available being a bit ocd with backups. They all flashed ok, but for ALL of them, when the phone booted it kept telling me had wrong pattern when i tried to unlock. Not good. Thought only way back was to factory reset and do all the app loading and setup again.
After a bit of searching found this thread and this post.
https://forum.xda-developers.com/showpost.php?p=69189392&postcount=65
Worked a treat.
The other methods didn't and i suspect are obsolete.
Anyow, posted for info if anyone else runs into this problem. Success dependent on having working TWRP and being able to boot to that as you need to use the File Manager capability in TWRP.
Seeyahs!
Same thing happened to me last week, when I tried lineage, found the answer on HTC forum,.
So avoid that from happening , before you make a backup, unlock all securities( pin, password, fingerprint) then make a backup, next time you restore your backup, it will boot without any issues.
ta for that. will try.

PIN changed, can't get in now

I got a notification for system update. When I rebooted, my tablet started up in TWRP. The update finished (I don't Know if it was successful or not). After I rebooted into system, my usual PIN is not working, do I can't get access. I'm away from home and away from my PC for a couple of weeks, so I'm limited in what I can do.
Does anybody know how to get a PIN to work? Looks like TWRP has been replaced with regular recovery on partition 1, but I have TWRP on partition 2 also. Is there a way to get into TWRP on partition 2 without a desktop PC?
I have the same problem, after the system update yesterday my old pin does not work anymore. What could I do?
So, before you updated, was your tablet rooted? Did the update use TWRP or the stock recovery? Did you have a pin set before the update?
before the update I use PIN and fingerprint reader, device was not rooted.
The update was offered by the device and ran normally.
Now my PIN does not work anymore. I do not have an "ok" button
when entering the PIN and I do not remember if there was one before?
My pin was reset after I updated, but I thought it was because I had replaced the stock recovery with TWRP. I've heard that there's a bug in TWRP that can mess up your pin. Now it looks like the pin problem is happening with stock updates, too. I'm surprised that other people haven't reported it.
If you had TWRP installed and you were able to boot into it, there's a way that you can use the TWRP file manager to delete the pin lock files. In your case, you will probably have to do what I ended up doing. I copied into Huawei eRecover and reset the tablet. That means it was wiped and I had to restore my apps and settings. You could try to get in touch with Huawei support first and see if they have a solution, since it appears that a stock update caused the problem. Please post back again if you find a solution.

ADVICE: VARIANCE ON MISSING OEM UNLOCK (Gs8+, Oreo)

Hey guys,
So I went to do a factory reset on my phone on Saturday just gone (and several more times on the Sunday), since apps started randomly not working properly. Anyway, I figured since I'm doing a reset I might as well re-attempt installing RenICE since the last time I tried, the support for gs8+ was still very early.
So I reset the phone and go to flash TWRP (tried 3.14 and 3.2x), using Odin.
I have developer options enabled and USB debugging, but there was no OEM unlock button.
So I tried the following tricks:
- disable all auto-updates (not the one inside Google Play)
- disable automatic time set
- set time to 7 days before the current date
Apparently doing this and resetting enables OEM unlock, however the time just reset to a variance between the current date (when wifi or network was enabled) and 24 hours prior the fac reset (with sim removed and wifi turned off)
I have my gmail account put into the device. I also tried wiping the cache, which succeeded but still did not affect the current known date and no OEM unlock.
I did some digging and this can happen when the BL is already unlocked... so I put it into recovery mode and it says "OEM LOCK: 1" or something to the effect that it is still in fact locked.
I even tried re-flashing an XSA rom and that didn't change anything either.
Anyway, I've just found a potential solution to this problem and I just want to share it with the community in case anyone is facing the same problem.
It now seems very obvious, but I literally just tried it again as I was writing this post asking for help and now OEM unlock is enabled.
Solution: disable updates in Google Play Store then reset with wifi off and sim removed. (not sure about the combination here, the only thing I did different was Google Play. So it could be needing all three at once, might just be that last update setting needed switching off. Who knows, not gonna risk it again coz I want RenICE today haha)
If anyone is having this issue, or there are some hackers around with some spare time. Give it a whirl and lemme know how you go.
Some sys info:
Model: SM-G955F
Android: 8
Baseband: G955FXXU4CRI1
Kernel: 4.4.111-14315050-QB19732162
Build#: R16NW.G955FXXU4CRI1
Knox: 3.0
TIMA: 3.3.0
One question. You say turn off auto update play store then reset with wifi off and sim removed. My question is reset what? The wifi or auto update play store. A bit confused
Quick Steps to get OEM after flash a stock firmware
Nice to see your message, but I facing that trouble on the night and I notice this
Flashing stock firmware and doing the setup normally, I can't pass the 7 days going back then I do this; going to stock recovery and I do format data and cache and wiping cache, then do the setup normally and you can pass the 7 days going back to get OEM
santiago013 said:
Nice to see your message, but I facing that trouble on the night and I notice this
Flashing stock firmware and doing the setup normally, I can't pass the 7 days going back then I do this; going to stock recovery and I do format data and cache and wiping cache, then do the setup normally and you can pass the 7 days going back to get OEM
Click to expand...
Click to collapse
I also tried that and it didn't work for me... forgot to mention

Screen Lock security issue G975F Q Beta 2

Hi, Today I was using my phone and in mid day I realised my phone is not accepting my pin code but finger print is working fine.
I tried many time but pin didnt work and I used my pin code unlock few hours ago. Long story short I have reset my phone from recovery and setup my phone again.
BUT when I try to put a pin lock or password or any other security, my phone gives me error that is "Screen lock was already changed. Try again with the new screen lock." Screenshot attached
Any solution to this?
My phone is G975F on Android Q beta 2 DBT (VAU).
I have done factory reset , installed new firmware but it is not working.
kazim.asghar said:
Hi, Today I was using my phone and in mid day I realised my phone is not accepting my pin code but finger print is working fine.
I tried many time but pin didnt work and I used my pin code unlock few hours ago. Long story short I have reset my phone from recovery and setup my phone again.
BUT when I try to put a pin lock or password or any other security, my phone gives me error that is "Screen lock was already changed. Try again with the new screen lock." Screenshot attached
Any solution to this?
My phone is G975F on Android Q beta 2 DBT (VAU).
I have done factory reset , installed new firmware but it is not working.
Click to expand...
Click to collapse
Same issue with me as well. Can anyone help..
kazim.asghar said:
Hi, Today I was using my phone and in mid day I realised my phone is not accepting my pin code but finger print is working fine.
I tried many time but pin didnt work and I used my pin code unlock few hours ago. Long story short I have reset my phone from recovery and setup my phone again.
BUT when I try to put a pin lock or password or any other security, my phone gives me error that is "Screen lock was already changed. Try again with the new screen lock." Screenshot attached
Any solution to this?
My phone is G975F on Android Q beta 2 DBT (VAU).
I have done factory reset , installed new firmware but it is not working.
Click to expand...
Click to collapse
Was this right after installing the beta 2? When you installed Beta 1 did you leave the system as it was or did you factory reset it? if so can you quantify how many times you unlocked your phone before went south? Was you stuck after rebooting from realizing your pin is not working? Meaning, after the issue and you restarted the phone was you able to enter your pin and proceed, then afterward it stopped?
[edit] The reason why I ask about the factory reset is in one of the other Beta threads people was having a lot of issues and after a factory reset it became near flawless. As of right now I''m monitoring my phone to see if this will happen to me, however after Beta 1 I did a factory reset, so I'm not sure it's a symptom of lingering files. I usally after applying an update to a beta ROM, I factory reset and out of all the times I did it, Android Q was the most buggy and was the only Beta i reverted, but the phone was a Pxiel..
mykenyc said:
Was this right after installing the beta 2? When you installed Beta 1 did you leave the system as it was or did you factory reset it? if so can you quantify how many times you unlocked your phone before went south? Was you stuck after rebooting from realizing your pin is not working? Meaning, after the issue and you restarted the phone was you able to enter your pin and proceed, then afterward it stopped?
[edit] The reason why I ask about the factory reset is in one of the other Beta threads people was having a lot of issues and after a factory reset it became near flawless. As of right now I''m monitoring my phone to see if this will happen to me, however after Beta 1 I did a factory reset, so I'm not sure it's a symptom of lingering files. I usally after applying an update to a beta ROM, I factory reset and out of all the times I did it, Android Q was the most buggy and was the only Beta i reverted, but the phone was a Pxiel..
Click to expand...
Click to collapse
I intalled beta 2. Everything was working fine. But when I restarted my phone, it stopped accepting my 4 digit pin. Then i hard reset the phone and factory reset. But after that it not accepting any new Pin or Pattern to register.
What should I do know as there is no screen lock on my phone
mykenyc said:
Was this right after installing the beta 2? When you installed Beta 1 did you leave the system as it was or did you factory reset it? if so can you quantify how many times you unlocked your phone before went south? Was you stuck after rebooting from realizing your pin is not working? Meaning, after the issue and you restarted the phone was you able to enter your pin and proceed, then afterward it stopped?
[edit] The reason why I ask about the factory reset is in one of the other Beta threads people was having a lot of issues and after a factory reset it became near flawless. As of right now I''m monitoring my phone to see if this will happen to me, however after Beta 1 I did a factory reset, so I'm not sure it's a symptom of lingering files. I usally after applying an update to a beta ROM, I factory reset and out of all the times I did it, Android Q was the most buggy and was the only Beta i reverted, but the phone was a Pxiel..
Click to expand...
Click to collapse
I did a clean install fresh firmware for beta 1, clear cache for beta 2.
I am not sure how many unlocks but i took few days after beta 2. My phone was waorking fine in morning as I unlock my phone in car using pin. But in after noon when I used the pin it showed me wrong pin. Every thing related to security wont work. Cant register finger print or face. But if you do same in secure folder everything will work fine.
Okay if it happens to me I will try to track down how it happened.
You did something and screwed up. A lot of people are using beta 2 already and have not encountered this issue, myself in it. I have done a lot of restarts and I have changed my pin successfully.
NickosD said:
You did something and screwed up. A lot of people are using beta 2 already and have not encountered this issue, myself in it. I have done a lot of restarts and I have changed my pin successfully.
Click to expand...
Click to collapse
What about other people who are affected by it? Read comments in Android 10 beta thread on page after 135. You will find people reporting this issue.
I didnt do anything with my phone just updating with beta.
I'm another that's been affected, had to do a factory reset via bootloader.
Currently stuck on Beta 2, Smart switch won't downgrade.
No security options available and an extremely buggy phone.
A new update has been pushed out. I just received it on my phone. Will be performing a factory reset once the update is installed and will setup the phone from scratch.
ashwinrajsr said:
A new update has been pushed out. I just received it on my phone. Will be performing a factory reset once the update is installed and will setup the phone from scratch.
Click to expand...
Click to collapse
Update me if it has fixed the security issue.
i installed *emergency update* , no wipe,no reset ,things go back to normal
Everything is cool as the phone has not been blocked. Otherwise there is no way to upload the update.
I wonder why they can't release the patch to upload it via ODIN, that would solve the problem.
Wait what !?!?, the same thing happened to me
Even worse - i rolled back to P, where i was able to add a pin but it would always forget it. I ended up going to a samsung center where they changed the board (in warranty), they said my unique device key was corrupted - likely due to internal storage error
So it is a beta problem then
Please provide feedback in the samsung members app. Those that cant, send feedback in the official thread at samsung forums.
Beta 2 is Terrible, having all kinds of Problems with it. Beta 1 was Much Better. Hope another Update comes out soon or will just go back to PIE. G975U S10+
I do have the same problem on my Zenfone 6z. After I relocked my bootloader I couldn't set up a pin. Asus still haven't rolled out an update.

Can't Set Any Pattern, pin or password expect swipe on lock screen.

I had installed the one ui 2.0 beta. But after using few days when I restarted my phone and was unlocking it using the given pattern, it showed "Incorrect". So I downgraded it to android 9 one ui 1.1 using odin and sammobile. Now when I try to set any new screen lock it doesen't work. Its just stuck on swipe. Sometimes I even get "lockscreen settings force stops" message. Kindly someone please fix my problem.
Have you tried doing a data factory reset in recovery?
Install the new emergency update of android 10 beta. Otherwise there is no fix. Do do factory reset.
I get same issues. I do what OP do too with no luck, i do several time flashing android 9 pie with no luck. I hope somebody have an answer. I try to take my phone to service center tomorrow if the issue still ther
you can install last update 29/10/2019 by SD Card in theis post
https://forum.xda-developers.com/s10-plus/how-to/galaxy-s10-sm-g975f-official-oneui2-10-t3980879
Have not seen Emergency Update for S10 Unlocked G973U1 to fix problem.

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