Restore a backup of data partition if you have one ofcours. If not, make one and try to restore it. As last resort, wipe data dalvik and cache aka factory reset.
y u quote OP?Requirements:
You must have TWRP 2.8.7+ installed to use these zip files. Thanks to Dees_Troy as always for that. And, of course, you must have your bootloader unlocked for TWRP to work. Currently only H815 EU and (some) SEA variants have official unlock through LG's unlock page HERE. Please do not ask if "model x" is supported... did you unlock via LG's official unlock tool? Yes? then you can use the zip. No?.. then you should skip the zips and just flash the KDZ instead.
If you have a locked bootloader and want to upgrade... just use LGUP and flash the KDZ. Don't risk it with FlashFire.
These directions should be used by everyone who wants a rooted 20G system.
Don't want root? Then it's probably easiest to just flash the stock KDZ using LGUP HERE... or just skip the SuperSu steps.
1. Download LG-H81520G-Flashable.COMPLETE.zip listed under the download section and place it on internal or external sdcard.
2. Also download the latest SuperSu zip (2.67+) from HERE [Thanks to Chainfire for his auto-patching boot.img version!]
3. (re)Boot into TWRP if not there already.
4.* Backup current partitions: boot, system, data, efs (backing up anything is optional but suggested)
5.* Up to you if you want to wipe data (TWRP > Wipe > Swipe slider) but not needed if coming from a stock rom.
6. Install LG-H81520G-Flashable.COMPLETE.zip (Install > select zip > swipe to confirm/flash)
7. Install SuperSu zip (Install > select zip > swipe to confirm/flash)
8. After zips finish flashing you can reboot! (if TWRP asks if you want to install SU, HIT NO!!!)
Please do not mirror my files!
Also, all stock images for 20G are available in the link below...
Click button below to view MD5 for each file...
MD5 (aboot.img) = 7c493525861c4266d530e738062fc315
MD5 (boot.img) = 2875872b0a1d2805d9b2733288b9a8fb
MD5 (cust.img) = d7af7d1b148e14b2aa2d66e16ffd54a4
MD5 (factory.img) = 8d382e47c15ce8e7e40ab4d23a62681c
MD5 (hyp.img) = d049d428439dcd6b5a86c31fcfe29308
MD5 (laf.img) = 0b8aa1bc5ee9983b86bd9a8bccb337d2
MD5 (modem.img) = 714083449d733ed086a88eb192d77994
MD5 (persist.img) = 3d77aadd5ac3f6fb740c1af4798a8827
MD5 (pmic.img) = 03482eec78f8b7d29146c8f384b3c437
MD5 (raw_resources.img) = 9aa291963a8d7b8757d3da5a482a0bbe
MD5 (rct.img) = 03e489583925004bab373b4fd71ab251
MD5 (recovery.img) = d189812d83478840bc50a8d38bff02bf
MD5 (rpm.img) = 60901753bf5929dcf59aa3d31b3bb036
MD5 (sbl1.img) = f69b18f074eded758418f911d7664c6e
MD5 (sdi.img) = ad50c1ef2f127e2f5ab1b87d550a036f
MD5 (sec.img) = 6cd71a0e217d8aac823028c8c520808e
MD5 (system.img) = 0aad230efe49fb2dabf4a31c62272a20
MD5 (tz.img) = 9425a1d8a298b899ddd42d31a9e3b927
MD5 (LG-H81520G-Flashable.Boot.zip) = 2bb3b8e280ab65eead6e4fee424ba747
MD5 (LG-H81520G-Flashable.Bootloader.zip) = 801c446c09866efb341faacf71d96a80
MD5 (LG-H81520G-Flashable.COMPLETE.zip) = b098f7031e95f52ccbc1c37039468bce
MD5 (LG-H81520G-Flashable.Modem.zip) = 1e896ae6cb179c79c3ff90754da0925f
To downgrade you can use TWRP to restore your backups... and then just flash the matching bootloader zip and modem zip from my previous threads... or just check the CODEFIRE DIRECTORY link for previous stock files.
Use LGUP HERE to flash a previous KDZ version. KDZ will remove TWRP but easy enough to reinstall that.
Unofficial Bootloader Unlock:
Don't have official bootloader unlock? This guy claims to have a working method HERE...
Awesome! If I'm already running Imperium 5.0 and just want the updated bootloader and modem (currently using the 20d variants), I'm guessing I can just backup and flash the modem and bootloader zips in TWRP? No need to completely return to stock/install the full zip?
hello im on cm 13 but my camera auto focus does not work. I just need to know what I need to download from the first page and installation order so I do not mess up my phone.
other than the current camera not focusing I do not have any other problems. If some one could just simplify which one i need and do not need and the order I would greatly appreciate it