Filed Under (LG Android Phones, LG Optimus Series, LG Phone Problem and Solution) by lg-phones on 10-01-2011

Each rom for LG Optimus One pretty much has a comprehensive guide on how to install, first things first is you need to have a custom recovery for your LG Optimus One, after that all customizations and roms will follow. LG Android Phones

How to do a custom recovery for the LG Optimus One? Okay, Lets start the custom roms!! LG Phone Problem and Solution



To use copy flash_image and recovery-RA-GNM-thunderg-1.1.0.img to the root of your sdcard. LG-Optimus info

To flash: via adb shell or terminal type this from root su # shell. (Do not type the # as its just for reference to show you need a root # shell not a $ user shell)


  • # mount -o remount,rw -t yaffs2 /dev/block/mtdblock1 /system
  • # cat /sdcard/flash_image > /system/bin/flash_image
  • # chmod 755 /system/bin/flash_image
  • # mv /system/etc/install-recovery.sh /system/etc/install-recovery.sh.bak
  • # mount -o remount,ro -t yaffs2 /dev/block/mtdblock1 /system
  • # flash_image recovery /sdcard/recovery-RA-GNM-thunderg-1.1.0.img
  • # reboot recovery

Key combo to boot custom recovery from powered off is vol_down + home + power and release keys at LG splash.

Recovery Features:

ADB as root user

USB-MS Toggle :mounts sdcard as mass storage

Nand Backup : runs a nandroid backup of data, cache, boot, system
Nand Backup + .android secure : backs up above plus .android_secure on sdcard (froyo native apps on sd)
Nand + ext backup : data, cache, system, boot, plus apps2sd on ext partition (old style apps2sd)
Nand Restore : browse to and select nandroid backup to restore

Flash Zip From Sdcard: Update.zip must be in root of sdcard
Wipe Menu:
Wipe data/factory reset: wipes data & cache
Wipe cache
Wipe Dalvik cache : Wipes Dalvik cache in all possible locations if moved by apps2sd
Wipe SD:ext : Wipes Apps2sd ext partition
Wipe Battery Stats
Wipe rotate settings
Wipe .android secure : Wipes froyo native .android_secure on sdcard

Partition Sdcard:
Partition SD: Partition’s sdcard for apps2sd (this formats card so all non backed-up data is lost)
Repair Sd:ext
SD:ext2 to ext3 : coverts apps2sd ext2 partition to ext3 (requires kernel support for ext3)
SD:ext3 to ext4 : same as above but ext3 to ext4 (requires kernel support for ext4)

Gui mounts to avoid typing in terminal to mount and cd into a dir to mount system, data, cache, sd-ext (if exists), sdcard

Fix apk uid mismatches
Move recovery log to SD
Toggle Signature Verify : Turn of signature checking on flashing zips
Key Test : Output keycodes for debugging recovery

Note this recovery and the one for the LG Vortex have a service that instantly reboots out of recovery once you load it & I disabled it and thats why you get a E: "Bad Boot Message" on inital startup. Its completely fine.

Recovery Key mapping:
Up & down : vol-up and vol-down
Select : Menu
Backup : Back

Source http://androidforums.com/getitnowmarketing/221388-custom-recovery-optimus-one-p500-thunderg.html

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ian on 14 March, 2012 at 8:46 am #

flash_image recovery /sdcard/recovery-RA-GNM-thunderg-1.1.0.img . when i hit enter this its say’s no such file directory found. any idea.. please reply to my email. tnx

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