First of all, yes I have gone through droves of posts on XDA and frankly it’s a mess, but I can tell you that after following a few threads that just refer to themselves in loops, there’s no actual solution.
I have an LG US730 which was rooted and everything was great. I must have toggled something in SuperSU - I think maybe the option to be rooted during boot.
Anyway, now all I get is Security Error and it shuts off. None of the recovery power on switches will work. The only thing I could do is VOL+&- power while the usb is plugged in and it goes to a download in progress screen. Of course nothings happening and I need to remove battery in order to get this powered off at this point.
Anyway, I’d love if anyone has a tool to repair this. LG’s utilities all do nothing at all I think they’ve purged the back-end of older stuff so the programs that should download something and proceed simply wait forever.
galaxy a12: lineage this tutorial: https://xdaforums.com/t/guide-gsi-installing-lineageos-or-gsi-roms-for-a127f-binary-u7.4513051/
galaxy grand prime: i’m not teaching you to bypass FRP. this is a stolen phone.if you ever get it unlocked, and can find a functionnal aromainstaller download: https://xdaforums.com/t/rom-aroma-pre-rooted-stock-rom-g531h-pre-rooted-deodexed-debloated-stock-rom.3551178/
galaxy j7: flash lineage by following this https://xdaforums.com/t/rom-sl-lineageos-19-1-for-j7-2017-pro-alpha.4604345/
desire 530: technically lineage is available but no tutorial and probably unstable: https://xdaforums.com/t/rom-6-0-lineageos-13-0-for-htc-desire-530.4682192/
j3: lineage with tutorial: https://xdaforums.com/t/rom-lineageos-14-1-for-samsung-galaxy-j3-2016-sm-j320fn-f-g-m-unofficial.3667015/
galaxy s5: lineage from this link (no tutorial): https://xdaforums.com/t/unofficial-lineageos-19-1-android-12l.4427639/
moto e4: lineage with vague tutorial from: https://xdaforums.com/t/rom-unofficial-woods-darklineage-14-1-20200913-mod-of-lineageos.4162339/
galaxy s III: locked to verizon so probably not possible, this might work, it might not https://xdaforums.com/t/rom-unofficial-14-i9300-lineageos-21-0-alpha.4648114/
lg us110: couldn’t find anything
lg d415: https://xdaforums.com/t/rom-official-cyanogenmod-11-for-lg-l90.2831541/ maybe
l38-c: couldn’t find anything
us-730: is already bricked as you know
moto x: lineage (no tutorial) https://xdaforums.com/t/official-lineageos-18-1-for-the-moto-x-2014.4255337/
i won’t even try the last 2 what the fuck is this
FRP does not mean stolen phone. More often than not it’s one of many many other reasons. But that’s fine you don’t do something you’re not comfortable doing. Totally respect that. It’s just a very quick thing to conclude when more often that’s not the reason.
Also, I know many ways to do it and have succeeded on many, but sometimes something in the phone is glitched. As is the case here.