Install custom recovery image
The recovery image is an alternative bootup instead of normal Android Operating System. It allows low-level operations such as backup/restore a ROM, wipe partitions, and flash ROMs.
4. Download and copy the recovery image VM670NH_recovery.img (works with new & old OV screens) onto your /sdcard.
5. Install the Flash Image GUI app (save the .apk to a /sdcard directory, then open it with file manager). Run the app & select 'Recovery Image' option with the file above.
Flash Custom ROM
http://forums.androidcentral.com/op...inferior-human-organs-unofficial-cm7-1-a.html (Gingerbread)
6. Copy the unextracted ROM .zip that you wish to install to the /sdcard dir. Also if installing a CyanogenMod Gingerbread ROM, the unextracted gapps.zip also needs to be placed in the same dir to flash right after the ROM .zip.
7. Boot into Clockworkmod recovery mode (From powered off state, hold vol-down, home, and power button until the LG logo appears).
8. FIRST, BACKUP ORIGINAL ROM! Don't continue until this is successful. use vol-up/down, camera, & back keys to navigate in recovery.
9. Wipe Data/Factory Reset, wipe cache partition, & under Advanced Settings, Wipe dalvik-cache, then format all partitions EXCEPT /sdcard.
10. Flash the custom ROM.zip from sdcard and gapps.zip too if going to a CyanogenMod ROM
11. Reboot and enjoy the new ROM, the first boot takes longer than usual, also some problems may disappear after rebooting.
NOTES:
-
NEVER use the Android Settings 'Factory Reset' from now on, only do factory reset & wipes from within recovery mode. Most ROMs should have this option removed from the Android settings.
- Some newer Optimus V screens hardware changed, see link:
http://forums.androidcentral.com/op...black-screen-custom-recovery-custom-roms.html (BobZHome's IHO recovery from the Wiki binary -> recovery page also works with newer screens.)
- If restoring a backed up ROM in CWM recovery gives 'MD5 mismatch' error (likely caused by renaming a ROM backup). Try this fix:
# cd /sdcard/clockworkmod/backup/<name_of_backup>
# rm nandroid.md5
# md5sum *img > nandroid.md5
- If you ever want to restore to original stock ROM (
ONLY on OV's with older screens), with original recovery and UNrooted:
How to restore your Optimus V to almost original condition - Prepaid Android