[LG V20 Guides, News, & Discussion] wantpizza:
HOW I GOT LOS 17.1 ON MY PROBLEM H910 HANDSET...

OH AND I DON'T KNOW WHAT I AM DOING SO I AM CERTAINLY NOT RESPONSIBLE IF THIS TURNS YOUR PHONE INTO A PAPERWEIGHT OR A NEWFANGLED COFFEE MAKER OR ANYTHING IN BETWEEN

Thanks Walter White for his intel - here

So I tried that initially with no luck. But there is something goofy with my phone hardware I think. So - combining it up with intel from Emma Mensah and her post (Thanks Emma) here

I made this NooB friendly (I think) - mostly because I am not too smart and have been drinking too many martinis while flashing my phone lately… and I wrote this down so I’d remember what I did (wrong again).

I am betting this process can be simplified and you don't need to take all these steps but all I can say is here is what worked for me:

In TWRP go ahead and backup where you are at… just in case.

In your current install - go to settings/general/Fingerprints & Security - click lock screen and change screen lock to “None” - to avoid triggering FRP - (Factory Reset Protection- trust me what a PIA that can be...)

Shut the phone down and pull the sim card out.

Do what I call a “3X wipe” - most certainly overkill but sorta spiritual for me now… When all else fails - try it again with a 3X wipe… And that is:

Advanced wipe - select the first 5 partitions - all EXCEPT Micro SD card and USB OTG

Format data - type in yes

Slide to Factory reset​

Don’t reboot - Install standard nougat H910-10r from here (Thanks runningnak3d). Obviously this procedure is for H910’s only - that is all I have…

Wipe Cache/Dalvik (there is a button - bottom left after flashing)

Install magiskV 20.4

Reboot system.

It should “cook” for less then 10 minutes. Don’t add the wifi (saves time)… but add a fingerprint and make sure that works. If it doesn’t - stop now and try again.

Next/Exit through “AT&T Setup & Transfer”.

Agree to EULA, skip the rest and click Done.

Check the flashlight and the camera. If it doesn’t work - stop now and try again.

Then go to settings/general/Fingerprints & Security - click lock screen and change screen lock to “None”.

Reboot into recovery - install LOS15.1 and Wipe Cache/Dalvik.

Reboot System

Start it up. Don’t add the wifi… but add fingerprints and make sure that works. If it doesn’t - stop now and try again.

Agree to EULA, check the flashlight and the camera. If it doesn’t work - stop now and try again.

Then go to settings/general/Fingerprints & Security - and change screen lock to “None”.

Reboot into recovery - install LOS15.1 and Wipe Cache/Dalvik.

Install magisk-v20.4

Reboot system, Log in, add a fingerprint… delete the lock screen…

Reboot into recovery - install LOS16.0 from here then wipe Cache/Dalvik.

Stay in recovery and install LOS17.1 from here

I used Lineage 17.1 4/22 nightly… the newest at time of writing - but you should be able to use the most recent.

Wipe Cache/Dalvik. (no boot or anything in between)

Flash Magisk-v20.4 and then Open Gapps arm64 10 nano (I choose Nano - but you can choose what you like - it shouldn’t matter).

Reboot system. It should “cook” for less than 10 minutes.

Immediately I checked the flashlight and it worked… I checked the camera and it opens and worked. And this is where it gets goofy.... Next I added my wifi connection… and I click “Complete System Setup (or something)”... Meanwhile Android Setup does some “Preparing for System Setup” and then “Finishing system update”...

I added my Gmail account. As soon as the update finished I went to take a picture and I got the ominous ... "Can't Connect to Camera" error. Plus the flashlight icon doesn't work again.

Install Fx File manager free from the play store. Enable root access, enable read/write system.

I followed Walter White's file edits from here

Reboot and bingo... Camera, GPS, Fingerprint reader and Flashlight all work.

All I can say is I hope this helps someone. And thanks to all who came before me and continue to support this ageing phone. I still love it.