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[Virgin Mobile/Sprint] VM LS720V8 - Updating, Rooting, and Unbricking

Discussion in 'Android Devices' started by xclusive36, Oct 20, 2014.

  1. xclusive36

    xclusive36 Android Expert
    Thread Starter

    As with any guidance provided you assume all risk using the information. You always run the risk of bricking your phone. All information provided by myself and the below forum members is given as guidance only.

    The following guidance will assist you with updating and/or rooting your VM Optimus F3.

    To check your current software version select System settings > About phone > Software information > look at software version (ex. LS720ZV8 is v8)


    This post provides information that will assist with updating form software LS720V7 > LS720V8.

    If phone is soft-bricked then select this link to go to the VM unbrick post.

    The unbrick post provides download links for VM software versions 5, 6, 7, and soon 8


    NOTE:
    If your phone is currently not rooted then be patient and you will receive a prompt to accept the Over-The-Air update. Follow prompt and phone should reboot and install the OTA update without issue.

    If you have rooted your phone but have not installed a custom recovery such as cwm touch, or twrp, install the update.
    * Un-root your phone first through SuperSu app
    SuperSU:
    Select >SETTINGS >Full unroot

    If you have rooted your phone, and have installed a custom recovery such as CWM Touch, or TWRP and have not modified stock system files such as installing a theme that uses modified system files:

    Running the update with CWM Touch installed will cause a soft brick.
    Running the update with TWRP however will not cause a soft brick.

    Install TWRP, and then run the update. (You don't need to boot into it. running the update will do that for you)
    * Un-root your phone through SuperSu app after you have installed TWRP but before you run the update.
    SuperSU:
    Select >SETTINGS >Full unroot

    Once the update completes, your recovery will revert back to the stock recovery.​

    If you have modified system files, you will need to choose to not update, or run the unbrick guide to reset your phone. You can also install one of the stock roms to reset the system files. There will be no modified update posted.


    Note: if you have link2sd installed, running the update should not affect it.
    if you have [MOD]App2External_SD installed, running the update should not affect it.


    Rooting method:
    StumpRoot: [Root] Stump Root for LG Devices (2012 - 201
     


    #1 xclusive36, Oct 20, 2014
    Last edited: Sep 13, 2015

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  2. daffyducknj

    daffyducknj Android Enthusiast

    This should be the link to get to towelroot: https://towelroot.com/ The site can't be accessed using a normal http link, as most browsers will give a warning about an invalid certificate.
     
    xclusive36 likes this.
  3. xclusive36

    xclusive36 Android Expert
    Thread Starter

    Thank you, I updated the OP
     
  4. daffyducknj

    daffyducknj Android Enthusiast

    You're welcome. Not sure if I want to run this, though. Twrp still has the problem of restoring the /data partition from a backup, that's a huge problem for me. I haven't been prompted yet OTA to install the update; my phone is using your modded v7 update.
     
  5. xclusive36

    xclusive36 Android Expert
    Thread Starter

    You can backup using cwm touch
     
  6. daffyducknj

    daffyducknj Android Enthusiast

    Yes, but you mentioned that leaving cwm on while updating will cause a soft brick. So I guess backup with cwm, restore with stock v7 rom, then install twrp, then the update? After all that, attempt root with towelroot? Hmm...
     
  7. lilrich1789

    lilrich1789 Well-Known Member

    is there a significant difference between v7 & v8?
     
  8. zuul

    zuul Member

    i have cwm touch installed... not running any themes though...

    what's the difference between a soft brick and a regular brick? either way sounds like something i don't want to deal with...

    is there a way to disable the update? or is ignoring it or trying to work around the soft brick the only options i have?

    thanks.

    edit: saw in another post where you said no way to disable notification yet.

    part of my problem is while i'm not a newbie... and i've flashed plenty of roms and installed custom recovery on several phones... i use a mac and it's very difficult to unbrick stuff with a mac since most of the scripts and other files are for windows. i'm not a power user or very good with the line command stuff... i get nervous anytime i have to open a terminal window and start messing around with stuff...

    now i'm wishing i had never installed cwm. i'm not using any custom roms or anything the only reason i even put it on there was out of habit from rooting the phone in the first place.

    can i uninstall cwm and then unroot... install update and reroot? will towelroot even work with v8?

    the more i think about what to do the more confused i get . frustrating.
     
  9. nobreak1970

    nobreak1970 Well-Known Member

    Time to change phones then.
     
  10. zuul

    zuul Member

    hmmm. i guess i'm blind.

    i have a question though. if i already have cwmt installed can i switch my recovery to twrp? i would think not but i don't know enough about such things which is why i ask.

    seems like the only option i have is to either a. brick my phone, find someone with a windows machine so i can unbrick it, or ignore the update notice. which is hard since every 2 minutes it pops up and i have to hit "install later"

    or like dude says "time to get a new phone." lol.
     
  11. nobreak1970

    nobreak1970 Well-Known Member

    Without the modded roms this just turns into a pain in the ass.
     
  12. xclusive36

    xclusive36 Android Expert
    Thread Starter

    back up with cwm. Afterwards, install twrp and then run the update. Then reinstall cwm when complete so you have access to your backup when you need it.

    Your backup won't go anywhere unless you purposefully delete it.
     
  13. xclusive36

    xclusive36 Android Expert
    Thread Starter

    I don't know. At this point not very many people have received it yet. If anyone has received the update, can you tell us what the differences are?
     
  14. xclusive36

    xclusive36 Android Expert
    Thread Starter

    A soft brick is when your phone can't boot into android but can be fixed with running the unbrick tool, installing a rom in a custom recovery, or installing a rom in a fastboot command prompt.

    A hard brick is when your phone can't be fixed.

    I don't know if towelroot will work with the update, Not to many people have received the update yet and have reported back. If you have received the update and can confirm if towelroot will work (or won't) can you report back?
     
  15. xclusive36

    xclusive36 Android Expert
    Thread Starter

    Yes, just download the zip, extract it and then run the *.bat file just like you would with cwm.

    If you wish to switch back to cwm from twrp, just do the same thing with the cwm zip as well.
     
  16. xclusive36

    xclusive36 Android Expert
    Thread Starter

    It can.
     
  17. gherkaul

    gherkaul Android Enthusiast

    I have just flashed the zv8 bin file with LG Flash Tool. Bad news folks...Towel Root no longer works. :( I'm heading in to work so I won't be able to test other exploits until later today.
     
  18. xclusive36

    xclusive36 Android Expert
    Thread Starter

    I had a hunch that's what this update was for
     
    berribunny likes this.
  19. xclusive36

    xclusive36 Android Expert
    Thread Starter

    Does anyone have a bin file for this update? Ill make a stock rom with it if its available
     
  20. gherkaul

    gherkaul Android Enthusiast

    Maybe it's just my phone or a bad internet connection. I'm away from my PC but I'll send you a link to the bin file I made when I get home tonight.
     
  21. xclusive36

    xclusive36 Android Expert
    Thread Starter

    Thank you :cool:
     
  22. lilrich1789

    lilrich1789 Well-Known Member

    my wife has a complete stock f3 on v7 ill update hers to v8 when i get off work and look n see what differences there is
     
    bkttk2 likes this.
  23. nobreak1970

    nobreak1970 Well-Known Member

    You rock my friend.
     
  24. DevoutDev

    DevoutDev Android Enthusiast

  25. xclusive36

    xclusive36 Android Expert
    Thread Starter

    Yes, and also try this one:
    Security Research by Dan Rosenberg

    made by djrbliss, the same guy who made the loki exploit
     
    bkttk2 likes this.

LG Optimus F3 Forum

The LG Optimus F3 release date was June 2013. Features and Specs include a 4.0" inch screen, 5MP camera, 1GB RAM, Snapdragon 400 processor, and 2460mAh battery.

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