[GUIDE] Fix PERSIST.IMG Loss Of Finger Print Sensor

[flick36]

Old guide said not to touch the sensor during calibration. New one is touch touch on all tests but the black rubber test.

Make sure you see a bunch of red lines after you run the calibration and it fails. Not just one.

indeed, that was the partt i was missing, now IT WORKS! just awesome dude THANK YOU SO MUCH i can donate to anywhere you want

I can't changue my vote in the poll, but IT WORKS!

 

[antnyhills]

indeed, that was the partt i was missing, now IT WORKS! just awesome dude THANK YOU SO MUCH i can donate to anywhere you want

I can't changue my vote in the poll, but IT WORKS!

Glad to hear it worked for you! I'm going to try to reset the poll now that I have everything corrected. I also just uploaded a crappy video guide and posted that to the top of the post.

I don't expect anyone to donate, but if you feel so inclined my donate button should be up to date with my PayPal!

 

[ekka1337]

Is it possible to upgrade to later oos after the fix? and the fingerprint will still work, or do we have to stay on 10.5.4 ?

 

[antnyhills]

Is it possible to upgrade to later oos after the fix? and the fingerprint will still work, or do we have to stay on 10.5.4 ?

Of course, you only needed to downgrade to get it working. Once fixed update to whatever ROM/version you'd like.

 

[cultofluna]

@antnyhills great job once more ..
Just one thing , on OP instructions you're missing the step to edit with root explorer the engineering mode config ( folder)

encrypt app "false
encrypt adb "false"
and reboot

 

[antnyhills]

@antnyhills great job once more ..
Just one thing , on OP instructions you're missing the step to edit with root explorer the engineering mode config

encrypt app "false
encrypt adb "false"
and reboot

There is a link to my other thread on how to do this.

 

[cultofluna]

There is a link to my other thread on how to do this.

Yep i missed that...

 

[megat.zulfadhli]

Finally! After trying a few times i manage to fixed my broken fp. Thank you so much! :good:

 

[Nosferatu.]

Now that there's a working fix maybe I'll get around to rooting my 8 Pro. Thanks for the guide!

 

[Deano1889]

Will this process work for the standard One Plus too?

 

[antnyhills]

Will this process work for the standard One Plus too?

Standard One Plus?

If you mean other devices... I hope it works but I can not confirm.

 

[pyry666]

@antnyhills this is great work! But I assume you need to use device spesific persist.img? Even if its broken. I needed to rma mine because changing my display at service center broke my FP. And I think that even that I had backed up working persist.img it some how thinked that my device was different caused by different ID on a display? I tried to ask but no-one knew for sure..And that was result after talking to customer service dude who I spoke same language with..

 

[Deano1889]

Standard One Plus?

If you mean other devices... I hope it works but I can not confirm.

Sorry, should have been more clear in asking if would also work on the One Plus 8 (non-pro). It might also worth posting on there too https://www.xda-developers.com/tag/oneplus8/

 

[antnyhills]

@antnyhills this is great work! But I assume you need to use device spesific persist.img? Even if its broken. I needed to rma mine because changing my display at service center broke my FP. And I think that even that I had backed up working persist.img it some how thinked that my device was different caused by different ID on a display? I tried to ask but no-one knew for sure..And that was result after talking to customer service dude who I spoke same language with..

Correct, you need your personal persist.img

Even though it is broken it still has all over your original factory calibrations including the fingerprint calibrations.

 

[antnyhills]

Sorry, should have been more clear in asking if would also work on the One Plus 8 (non-pro). It might also worth posting on there too https://www.xda-developers.com/tag/oneplus8/

Just posted on the OP 8 forum

 

[pyry666]

Correct, you need your personal persist.img

Even though it is broken it still has all over your original factory calibrations including the fingerprint calibrations.

That was my assumption also. Thanks for response!

 

[user0103]

Wait, so with this guide it is possible to fix FP even without 'original' persist image?

 

[Fischer1234]

I can happily say that after following the OP's video step by step, my fingerprint now works! I appreciate all the time and research that was done for this fix. Thanks again!

 

[pyry666]

Wait, so with this guide it is possible to fix FP even without 'original' persist image?

You need your persist.img! Broken or not but anyother devices wont work

 

[antnyhills]

Wait, so with this guide it is possible to fix FP even without 'original' persist image?

Yes, this fixes an already broken persist.img

As part of the guide you do backup and use your current broken persist. If you follow this guide, please read the instructions very carefully. Backup you broken persist.img to a computer as you will need this in order to fix it. Although broken it still has all your original factory calibrations.