Root [Virgin Mobile/Sprint] Phone keeps resetting after Unbricking.

cyberfunk · Aug 16, 2014

I flashed my Virgin Mobile LG Optimus F3 phone using the LG Flash Tool 1.8.1, the LGVM720_20130529_LGFLASHv151_Download DLL, and both LS720ZV6_03 and LS720ZV7_05 bin and now the phone resets every time I restart it. The flash finishes smoothly with both BIN's and I'm able to set everything up but if I shut down or restart the phone when it boots up it resets to stock automatically and wipes out everything. Any tips are much appreciated

*Update Also the phone doesn't show Virgin Mobile Start up screen or network anymore no matter how many times I flash. It just shows LG in both start up screen and Network but I still am able to make calls and get 4g data so I must be on Virgin Network. I can't root as the phone reboots/resets as described above after rooting using Towel Root and installing SuperSU and BusyBox. It freezes up and then reboots/resets. I'm baffled... Any insight is much appreciated.

xclusive36 · Aug 16, 2014

I don't know how to help you. I wouldn't know what to do

beaviskob1 · Aug 17, 2014

I think your phone is toast. My wifes has done the same thing and I've have tried everything. All VM bins V5, V6 and V7 deleted everything I could think of when rooted but it still will reset on crash or reboot. It acts like something corrupted memory as if I run too many tasks it crashes and reboots and resets every time every version.

OBTW: when I install cwmr phone won't boot only starts recovery and if I install a backup it just gives a black screen.

cyberfunk · Aug 17, 2014

Thanks so much for sharing. I was afraid something went wrong somewhere in the process of unbricking. I spent hours on the phone with Virgin and they could not find a fix either. Now I'm searching for a way to completely erase everything on the phone similar to formatting a hard drive. I want to completely erase all traces of the OS the firmware etc. before I flash the phone and start fresh if possible. If you have any ideas where to start please feel free to share

bkttk2 · Aug 17, 2014

cyberfunk said:
Thanks so much for sharing. I was afraid something went wrong somewhere in the process of unbricking. I spent hours on the phone with Virgin and they could not find a fix either. Now I'm searching for a way to completely erase everything on the phone similar to formatting a hard drive. I want to completely erase all traces of the OS the firmware etc. before I flash the phone and start fresh if possible. If you have any ideas where to start please feel free to share

Use unbrick method. It should wipe everything and setup phone back to out of box status. Good luck

cyberfunk · Aug 17, 2014

I've been using the unbricking method provided here but I think I may need something that goes a bit deeper. There may be a problem with the bootloader on my phone. Is there a way to diagnose, refresh or reset the bootloader on the LG Optimus F3? I know we can't unlock it but resetting it might clear up the problem with the automatic reset at boot.

gherkaul · Aug 17, 2014

You have gone as deep as you can. The Flash Tool wipes everything and re-installs...everything including the bootloader. I would say your best bet is to have a repair service look at it and see if it's something internal.

cyberfunk · Aug 17, 2014

Thanks everyone for your positive input. I called Virgin again today and they're sending me a new replacement phone. I guess it's a hardware problem. I'm not sure if I'll be brave enough to root this new device when it arrives for fear of landing back in the same spot. Maybe if a KitKat ROM is developed I might take the plunge.

One of the Virgin reps said this device won't be getting KitKat but who knows...

cyberfunk · Aug 20, 2014

I think it might have something to do with the locked bootloader and also maybe Virgin slipped some rooting preventative countermeasures in with one of the updates?
Another discrepancy I noticed is after flashing the V5 stock ROM and then trying to flash the V7 ROM the LG Flash Tool was reporting that my phone had V6.03 installed. No matter what version I flashed previously when the flash tool is activated it reports my phone as having version 6.03 installed so I know something is off. Anyway I may try a new ROM if some of the hard working developers can crack this stubborn bootloader. I never had problems like this with my Optimus Elite but that phone was too slow and ROMS usually ended up slowing down like molasses after install which is why I upgraded to the Dual Proccessor F3. If only I had known about this locked bootloader...

Root [Virgin Mobile/Sprint] Phone keeps resetting after Unbricking.

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