yashsingh1/xdaforums huggingface dataset:
[OnePlus 8 Guides, News, & Discussion] starcms:
Yes, it will definitely still work. All you need to do is flash it. Try renaming the original backed up file to persist.img and try fastboot flash persist persist.img

Make sure you are in the regular bootloader and not fastbootd when issuing command

Edit: Make sure you have the very latest adb and fastboot versions from Google for your PC. I betya this is the problem

Edit 2: Here's the link. Download and unzip to your adb/fastboot directory and choose to overwrite all existing files. Then try fastboot flash persist persist.img again.

SDK Platform Tools release notes | Android Studio | Android Developers

Android SDK Platform-Tools is a component for the Android SDK.

developer.android.com

Older versions can't deal with dynamic partitions and newer partitions like persist
[OnePlus 8 Guides, News, & Discussion] waleedbinwaheed:
So i tried again after fresh intalling adb and fastboot drivers along with oneplus usb drivers. but error is still there. kindly check reference images.
[OnePlus 8 Guides, News, & Discussion] starcms:
It's not adb and fastboot drivers, it's the apps themselves. I see you have minimal adb installed which is very very old. Delete all that and use adb, fastboot, and the other files in the link I provided.

Edit: make sure you have stock recovery installed (not TWRP), go to bootloader, and issue the command "fastboot reboot fastboot"

This command will only work with the latest fastboot version on your PC.

That will bring you into fastbootd mode. Try the fastboot flash persist command from there. It works for me from the bootloader, but it doesn't hurt to try in fastbootd mode
[OnePlus 8 Guides, News, & Discussion] waleedbinwaheed:
i copied all those files from your link in my minimal adb folder as you said. its just folder path showing now. should i run cmd from the folder itself that you linked?
[OnePlus 8 Guides, News, & Discussion] starcms:
No, if you replaced/overwrote all the files you had with the latest ones in the package from Google, you are fine. But you can try that just to make sure

See my edit in the post above for something else to try
[OnePlus 8 Guides, News, & Discussion] waleedbinwaheed:
finally it worked in fastbootd mode. flashed my original persist.img but now when booted to os, finger print harware not available error is showing.

edit: This backup image was taken when fingerprint was working fine. now its showing error, also what should i do now, 1: try to fix this one using your instructions, 2: flash broken persist from fastbootd mode and try again fixing that one?
[OnePlus 8 Guides, News, & Discussion] starcms:
That's extremely odd...are you sure you flashed the original, non-modified, original persist.img and not the one you made after it was broken but before you fixed using instructions in thread?

Edit: If you did, then I guess you'll have to follow the instructions in thread again to get it working again, then take a backup, and save that one for future use. Unless you had already taken a backup of the broken persist.img after you followed instructions in thread to fix FP, then you could simply do fastboot flash persist with the broken but fixed persist

So strange all the odd issues you've had, especially fastboot flash persist not working in bootloader. But flashing it in fastbootd mode wouldn't cause any problems.

Edit2: What did you use to backup persist in the first place? The MSM tool? While the FP sensor was working? If so, it should definitely be working ¯\_(ツ)_/¯
[OnePlus 8 Guides, News, & Discussion] starcms:
I'd recommend 1) fixing the current one with instructions, then taking backup, and storing it for next time it gets corrupted

How are you taking backups? MSM tool?

All sensors, wifi, etc still working fine?
[OnePlus 8 Guides, News, & Discussion] waleedbinwaheed:
so to answer all queries...

1: yes i followed one thread where i found msm tool for this device that after logging in and pressing f8 and selecting all partitions i took complete backup of all partitions in the first place right after initial bootloader unlock.

2. yes i flashed original persist.img that was working after initial bootloader unlock as said above.

3. NO i did'nt took backup of fixed persist partition earlier as i intended to use my original persist.img backup that i thought would work fine after flashing it, but it did not in my case, strange....

4. And finally yes i have fixed this persist.img and taken its backup for future use.. Also for persist file backup i used the command you quoted in your OP. to save it in SD root and from there to PC.

hope all this helps someone else too.. as this was a strange case specially fastbootd one.

Also Big thanks to You for your time and swift resposes. hats off!

EDIT: Yup all sensors, cam, wifi, all are working. infact they never caused any trouble even when initially FP went bad. they are working fine now too.
[OnePlus 8 Guides, News, & Discussion] starcms:
Glad you got it all working!

Usually, the FP sensor is the thing that breaks. A bad persist can take sensors and wifi down or even IMEI, but the most common thing is just the FP.

In number 4) did you mean using the DD commands?

If so, if you take a backup that way, it needs to be restored using the same method (with DD). If you take a backup with DD and then try to restore it by flashing it in the bootloader (or in your case fastbootd), it doesn't work. I mean it will flash but then you'll lose everything mentioned above (unless you have a backup) cause it'll let it flash incorrectly
[OnePlus 8 Guides, News, & Discussion] waleedbinwaheed:
So after fixing my FP using the instructions now im in the same boat as FP missing too much on lock screen and ambient screen. Say woking 5% of time. Also i read forums and checked dates as you told above, in my case dates are 7aug21 for unlock.so and 11aug21 for persist.so. 7 aug was when i first followed this Fixing guide.. any solution for this problem?
[OnePlus 8 Guides, News, & Discussion] waleedbinwaheed:
Glad you helped, highly appreciate the efforts!

And yes i used DD commands for every backup after the initial backup that was taken from msm tool. Only that backup was fetched automatically via tool.

And when i flashed persist in fastbootd it was the one which i got from MSM tool backup. This was my otiginal unbroken and working at time of backup (but didn't work after flashing). So was I doing correct method to flash instead of DD'ing?

And so following your Instructions and to be on proper side i again DD'ed my initial broken FP persist and followed fix again.
[OnePlus 8 Guides, News, & Discussion] starcms:
If you use MSM tool to backup, use fastboot flash to restore. If you use DD commands to backup, use DD commands to restore. Sounds like you got it right, still not sure why your backed up uncorrupt persist doesn't work right away
[OnePlus 8 Guides, News, & Discussion] starcms:
Unfortunately no. If you've "fixed" your persist following directions, it seems to no longer work anywhere near as well as before.

On OOS10 it only gave me issues at the lock or ambient screen. Once unlocked, it worked nearly 100%. On OOS11 the problem seems to have gotten worse and doesn't work well the majority of the time regardless if locked or unlocked (actually affects apps unlocking too).

But some is better than nothing or sending phone to OnePlus and paying them $250 to properly re-cal FP....at least for me.

Edit: my only guess is that for whatever reason, not only does gf_persist.so get corrupted (and can be fixed following instructions), unlock.so was also corrupted when FP stopped working (hence the much, much newer file date -- when in reality none of those files should ever be edited). So even though gf_persist.so can be fixed, the cal settings in unlock.so remain corrupted.

I don't know if this applies to the OP8 as well, but definitely applies to our HD1925s as I don't think the OP8s have unlock.so.

Edit: This really belongs in the thread for this issue in the HD1925 (T-Mobile 7T Pro 5G McLaren) forums.

[GUIDE] Fix Fingerprint Scanner with "corrupt" persist in 15 minutes!

Omg, I've been messing with this thing for 2 months trying to fix it, all because I didn't take a backup of my /persist as soon as I got the phone, but there is a way to fix it!!! The only pre-requisites are that: A) you still have your own...

xdaforums.com
[OnePlus 8 Guides, News, & Discussion] waleedbinwaheed:
Okay.

But I'm thinking of another option, as i backed up my original non broken persist.img after unlocking bootloader via MSM tool, so im sure that partition backup would have original non corrupt unlock.so file in it. Along with original persist.so

So the question, can that file be used in any way to help this issue.

Need your precious expert opinion in this regard..

Also should i continue replying in this thread or move the discussion to HD1925's.
[OnePlus 8 Guides, News, & Discussion] starcms:
Move to thread I linked, I'll answer you there
[OnePlus 8 Guides, News, & Discussion] niderium:
hi there i have a OnePlus 8 Pro after screen replacement i get error on FP enrolling that was not completed.

I did all the above more than 20 times step by step

i downgraded to 10.5.4 i backed up the persist.img the i followed the steps and nothing works still getting the error of enrolling. is there any tip ?

thank you in advance for your time
[OnePlus 8 Guides, News, & Discussion] starcms:
If you had a screen replacement, you need a new fingerprint calibration performed by OnePlus.
[OnePlus 8 Guides, News, & Discussion] niderium:
I have posted the mobile to OnePlus and I am waiting for their answer. Thank you for the answer though!
[OnePlus 8 Guides, News, & Discussion] niderium:
OnePlus asked to replace almost the whole mobile as they say they find signs of tampering with a cost of 505,90€ Of course I rejected as I can use fingerprint Id when bootloader is unlocked!
[OnePlus 8 Guides, News, & Discussion] starcms:
I honestly don't know how you replaced the screen without having OnePlus do it for you -- I didn't think the parts were available and it requires literally taking every bit of the entire device apart. You should have stopped and bought a new device right then and there.

Regardless, restoring persist or using the steps in this guide will NOT ever work for you. The calibration parameters for the FP scanner in persist depend on the exact screen installed, and by replacing it yourself somehow and not having OnePlus perform a full FP recalibration afterwards (which only they can do with a special tool), none of those parameters are correct any more for your new screen. In other words, your FP scanner will never ever work again.
[OnePlus 8 Guides, News, & Discussion] niderium:
I repair electronics for 14 years especially motherboards so it was easy to replace such a screen. I bought it from AliExpress as original and trust me it is original as it is taken out from other phone. I made it to work with the Chinese workaround but I need to have the bootloader unlocked. When I get the bootloader locked again I get the enrollment message again. Once I get the device back I will send you a video.
[OnePlus 8 Guides, News, & Discussion] starcms:
That's impressive, especially on this phone! But unfortunately it doesn't matter if bootloader is locked or unlocked, unless you have the special, proprietary FP calibration tool that OnePlus uses, you're s out of luck. Every screen is ever so slightly different and requires a FP recal after replacement -- it's the same reason you can't use someone else's persist. Welcome to "modern" phones...🤮
[OnePlus 8 Guides, News, & Discussion] niderium:
The problem is that when is unlocked works flawlessly when locked nothing!!yes that’s true they give every effort they have in order not to do any service with third party repair shops. Once I ll get back I ll try to keep the original persist because I still have the broken screen and see if with that will work. I think there are not so many chances but I’ll give it a try. I ll keep you informed!
[OnePlus 8 Guides, News, & Discussion] starcms:
Ah, okay, so what is happening is your original FP calibration is close enough to work alright with the new screen. But somehow (don't ask me, I've spent hundreds of hours screwing with this) it can tell the persist isn't "valid" any more and when you lock the bootloader, it purposefully corrupts the FP cal files in persist. So if you unlock and restore your original persist, it sounds like you should be alright. But locking the bootloader (or even running the MSM tool that relocks the bootloader) will always cause it to become corrupt again.
[OnePlus 8 Guides, News, & Discussion] niderium:
Exactly!!!!I have read every post on this forum regarding persist and by the time I was giving up I saw the Chinese solution and I tried it I compared the folders and I saw that on my original persist in /mnt/vendor/persist/engineer folder was missing couple o files then when I copied them from Chinese persist it started working with unlocked bootloader and when I relock it again fingerprint enrollment error!
[OnePlus 8 Guides, News, & Discussion] starcms:
Yep, so you're in the same boat as anyone who fixed their persist. It only will work while the bootloader is unlocked. You can't have a working FP sensor AND be bootloader locked, it's one or the other.
[OnePlus 8 Guides, News, & Discussion] niderium:
Yes and I am thinking of keeping it unlocked flashing a twrp recovery and flashing the ota’s from recovery in order to keep up with the updates
[OnePlus 8 Guides, News, & Discussion] starcms:
You can take OTAs no problem with the bootloader unlocked, you just have to be sure to restore the stock boot image for the version of OOS you are running (if you installed Magisk) and restore the stock recovery image for the version of OOS you are running (if you permanently flashed TWRP)
[OnePlus 8 Guides, News, & Discussion] niderium:
I was getting error when I was trying to install it at 93% if I remember. I ll try it again when I ll get it back!
[OnePlus 8 Guides, News, & Discussion] MsuatafaKhatab:
I always getting 2lines error only
[OnePlus 8 Guides, News, & Discussion] shykidd:
i get this error after trying firgerprint enrollment​

OPERATION_STEP_GET_KB_CALIBRATION TEST FAIL: GF_ERROR_INVALID_DATA​
[OnePlus 8 Guides, News, & Discussion] ahafiz2604:
what if i just install back to android 10 using ota? is it can?
[OnePlus 8 Guides, News, & Discussion] ahafiz2604:
sir. i cant find for this file "gf_persist.so" and my data and engineer oflder have 3
[OnePlus 8 Guides, News, & Discussion] marsianyn:
Hello. Do you know how calibrate new fingerprint sensor?

I changed the display from another phone. This display was with metal part of the case and fingerprint sensor. Old display and fingerprint sensor was broken and don`t work.

I have calibration rubber for other phone models.

I try calibrate but have error GF_ERROR_OPEN_SECURE_OBJECT_FAILED
[OnePlus 8 Guides, News, & Discussion] D3ATHL355:
How I can repeat that on MTK device, for example my OnePlus Nord 2 has broken fingerprint, all work excluding fingerprint. I search solution.
[OnePlus 8 Guides, News, & Discussion] Vove horosho:
What should i do if my bootloader is locked and i don't have root? I have to unlock it and have root and then do like in instruction?

P.s. sry for my English
[OnePlus 8 Guides, News, & Discussion] siyam_bruh:
hi in my phone after dumping percist.img,some file missing example engineermode_config is missing how to fix this?
[OnePlus 8 Guides, News, & Discussion] ValentinoNCS:
Hi guys,

So I flashed ColorOS 12.1 closed beta on my phone today (Oneplus 7t pro HD1910) and I rolled back to OOS 11 because ColorOS was so buggy and I can't use it as a daily driver on my phone. But the thing is, when I was on OOS 11, all the sensor was reversed and I needed to flash via fastboot a "persist.img" and after that everything worked fine except for the fingerprint sensor wich doesn't work anymore because of that and I think it's because I flashed a wrong image of that persist thing.

So I don't know what to do now and I tried so many thing to enable again the FID.. if you guys have any solution, just tell me :/

(Sorry for my bad english btw)
[OnePlus 8 Guides, News, & Discussion] jmkarnai01:
English was/is perfect and also in the same boot. Different model # but everything is exactly the same. Also looking for a solution but in no rush. If I find one that isn't posted here I'll let you know.
[OnePlus 8 Guides, News, & Discussion] Honestsheepherder:
did you get your issue resolved?

fail! operation_step_get_kb_calibration test

GF_ERROR_GET_CALIBRATION

UNDER CALIBRATION DATA ITS SHOWING FAIL

what to do op 8t screen replaced
[OnePlus 8 Guides, News, & Discussion] Shah Taj:
1:i am using t-mobile op8 in2017.i got my persist img corrupted before i could backup.

2: then i followed your guide and i messed up at some point.so when i go into fingerprint calibration,it now says calibration fail in the end(it said pass before i messed up.)

4: now i m on oos 12.1 and when go to register my fingerprint,it shows the icon but doesn't work.

5: i converted my phone to global and now it says my phone is in2015.

6: i got a fresh and okay backup of persist img of op8 in2015(another device).

7: can i just flash it and get it working?

or any fix please help me.
[OnePlus 8 Guides, News, & Discussion] Zakahev007:
device: oneplus 8t T mobile

KB2007

I cant seem to go beyond this step (4. Now we need to perform a FP calibration. We want to fail.) after unlocking engineer mode through root and bootloader also unlocked, i cant seem to perform step 4 of this tutorial, i get the error FAILED TO PERFORM BECAUSE DEVICE IS UNLOCK, i deduced that maybe i m getting this error because of an unlocked bootloader, how to proceed now im stuck? any help would be appreciated
[OnePlus 8 Guides, News, & Discussion] MrNobody19:
Hi, i have a question...

Do you guys know why I cannot enter finger print calibration test??
[OnePlus 8 Guides, News, & Discussion] 0V3Rlord:
I trying to calibrate fingerprint but i can't. Every time when i try to calibrate i have this error. Any possible solutions for this? Device is OnePlus 8 Pro with OxygenOS 10.5.4
[OnePlus 8 Guides, News, & Discussion] coded.jinax:
I am having a problem

on locked bl I can calibrate fp sensor but on unlocked bl I cant calibrate the fp sensor its says a error message that device unlocked
[OnePlus 8 Guides, News, & Discussion] Zeeshan Ahmed xda:
Hi First Thanks for the Good Guide , i got a phone having Fingerprint issue this was a Tmobile IN2017 Model Someone had change its Back Glass and Convert it to Global Dual Sim Variant it was Showing IN2015 Global Variant .So i followed your guide but unfortunately after i flash (MSM Firmware) it bricked ;D (But i have Backuped Persist Partition Already )ofcourse it was a Tmobile variant we cant flash it with Global EDL Firmware so i Tried Hard to Get Bootloader Unlock and did the same Process but Where we enable factory mode and Start Test it didnt Give Too Much Errors Like you showed and menthoned in video tried everything but same and even replacing the ORG data and engmode folder its not working so what could be the issue in my opinion 1st The persist Partition is already gone which i backup is the new one. 2nd my test mode was not good but i tried exaclty same in video Please Guide! Thanks
[OnePlus 8 Guides, News, & Discussion] catincoat:
Same problem! 10.5.7 version.

Is there solution?
[OnePlus 8 Guides, News, & Discussion] shahg3157:
how to take privious fingerprint backup
[OnePlus 8 Guides, News, & Discussion] zezinho7:
Hi all,

Hi @antnyhills

I installed a new mainboard to my IN2023 since charging+usb were damaged.

Now with the new mainboard + old screen the FP stopped working.

I have dd backups of the old + new mainboards persist partition.

i calibrated the FP acc. to the instructions (so that it fails with red lines as in the video) and copied data + engineer folder (without gf_persist.so) from the persist.img of the new main board, i tried the same with the old mainbards files.

without big success...

the FP sensor seems works temporarily after doing the calibration test, but unlocking is not possible due to bad calibratio ndata.

after reboot it stops to show completely again.

also i installed 1:1 the old persist.img to the new mainboard using dd..without success.

What would be the correct order to proceed here ? How can i get the FP back using unlocked botloader ?

I read that some users were successfull in installing new displays here...

MANY THANKS IN ADVANCE
[OnePlus 8 Guides, News, & Discussion] zezinho7:
Hi, can you describe the "chinese method" for me so i can try the same ?

I have a similar situation you had before. Would be really great !
[Samsung Galaxy Tab S4 Questions & Answers] veekay:
Figured I might as well start a new thread to discuss any success people might have with trying Q based GSI ROMS now that the update finally has hit.

Previously, only 9.x based ROMS would boot. In theory, we should be able to have some success with 10 now.
[Samsung Galaxy Tab S4 Questions & Answers] enotar:
Interesting! Keep us posted

Any link?
[Samsung Galaxy Tab S4 Questions & Answers] veekay:
It's going to be trial and error

https://xdaforums.com/project-treble/trebleenabled-device-development
[Samsung Galaxy Tab S4 Questions & Answers] veekay:
Ok, so it seems with the A10 update we now get to use AB images instead of A only, the main reason I haven't been able to boot anything.

The treble checking apps aren't in consensus about what we use, so I was still using A. AB seems to be the new way forward.
[Samsung Galaxy Tab S4 Questions & Answers] veekay:
Quack Phh-Treble 10 - Rotation problems during and after setup - too glitchy to really even try (EXFat does work though)

Havoc-OS 3.6 - Doesn't have the same rotation issue. Cameras working. Brightness is pretty good, no auto brightness. No EXFat support for SD card.
[OnePlus 8 Pro Questions & Answers] kng60ft:
Has anyone on Verizon able to get VoWifi working on unlocked oneplus 8 Pro? Verizon keep saying it's on oneplus end and oneplus keeps saying it's verizon..
[OnePlus 8 Pro Questions & Answers] daillcyruz:
I have a thread going I literally just asked a couple minutes ago lol..

https://xdaforums.com/oneplus-8-pro/help/oneplus-8-pro-verizon-wireless-wifi-t4101369
[OnePlus 8 Pro Questions & Answers] Oswald Boelcke:
[MENTION=2665632]kng60ft[/MENTION] THREAD CLOSED as a subject matter related thread already exists: https://xdaforums.com/oneplus-8-pro/help/oneplus-8-pro-verizon-wireless-wifi-t4101369

XDA Forum Rules (excerpt):
[Shadow ROM Development] ND4SPD:
After long last, I've finally updated the WM6.1 Clean Developer Edition and have fixed up almost all the problems you guys had with the original.

Changes from original 1.0 version:

Portrait Camera now working

MMS 4.0 is included with basic MMS settings

Custom splash screen!

Some other bugs I can't remember...

User Customization 2.0 - You'll really like this if you have a microSD card!

Installation:

Installation is now completely automated. If you are currently running the official T-Mobile ROM, please run the CID Unlocker.exe that is included.

Once you are CID Unlocked, run the Windows Mobile 6.1.exe program.

Done!

If at any time you want to go back to the T-Mobile ROM because of an error flashing or whatever, you will need to turn your phone on in bootloader mode. To do this, hold down the camera button and then press and release the power button while still holding the camera button down. Your phone should go to a screen with red,green, and blue bars. Plug it in to your computer now and run the T-Mobile Update from their site.

Download link: http://www.sendspace.com/file/vxxsq3

Rapidshare mirror: http://rapidshare.com/files/133831473/Clean_Developer_Edition_Revision_1.1.rar.html

Note: The T-Mobile Edition BETA 2 will be released sometime later today or tomorrow for those who have been waiting for an update since the last.
[Shadow ROM Development] nitroshot:
works great so far! thanks again for the updates
[Shadow ROM Development] lbakalinsky:
Beautiful, I love for your work :).