[HOWTO] Upgrade to marshmallow, dowgrade to ZV6, and Fix Status 2

[Awesomeslayerg]

Well guys i was having problems as most of you guys saw on the the unoffical TOT thread but thanks to @autoprime for mentioning LG UP i was finally been able to get past status 2
Disclaimer:
I am not responsible with what happens to your device when using this program.

DO NOT TRY TO FLASH BACK TO ZV5/ZV4 OR YOU WILL BRICK YOUR PHONE.

ATTENTION: DO NOT TRY TO FLASH BACK FROM ZVB TO ZVA OR BELOW BECAUSE OF A NEW ANTIROLL BACK PATCH.. AGAIN IF YOU DO YOU WILL BRICK YOUR PHONE

Requriements:
-LG UP: http://forum.xda-developers.com/g4/help/lgup-install-kdz-mm-lp-t3249803
- TOT Files:
Android Lolipop 5.1 ZV6 - http://forum.xda-developers.com/sprint-g4/development/restore-sprint-lg-ls991-zv6-tot-t3213196
- Micro USB cable from phone to pc and Drivers: http://forum.xda-developers.com/g4/general/lg-g4-drivers-t3127648

Steps to downgrade
1. First download and install LG UP from the thread BOTH MSI files.
2. Now put your phone into download mode via holding down the volume + and plugging it in to the usb.
3. Fire up LG UP and at first it may say UNKNOWN on the window so what you wanna do is disconnect and reconnect wait a few seconds and it should work.
4. Now it should say LS991 and select it and click ok
5. Now on the window select your ZV6 TOT FILE and select UPGRADE
6. On the bottom of the window there should be three dots click on them and find your tot file.
7. Click start.
8. After that your phone should start progressing
9, Should restart and work.
10. If it dosent make sure you factory reset!! (Hold down volume down and the power button and power then go the factory reset and wipe it)

To fix status 2 error
Thanks to @autoprime
1. flash zv6 and get stuck at blue screen.
2. power off phone and close lgup.
3. boot into download mode again.
4. this time.. instead of using LGUP.. use LG Flash method.
5. make sure you set LG Flash to use "Board DL" at the bottom of the screen where u select dll and tot.
6. should be able to flash either zv6 or zv9 using LG Flash (with Board DL option).

 

[Swetnes]

Glad you finally got it figured out...I must have gotten really lucky as I also got the dreaded 2 the first time but after uninstalling and reinstalling everything I was able to get around it...I am bookmarking this for future reference. Thanks again for your and @autoprime work.

Sent from my LGLS991 using Tapatalk

 

[s049031]

Thank you! You are a savior! I'll try to do it once I get home and update my post.

Finally, a sigh of relief. My phone is back from the dead!

 

[ironbesterer]

Just tried this and it still didn't fix status 2. I get the error, but instead of continuing on the phone, it stops. It just hangs at 0%. I guess I may be sending this phone into LG (praying that they will fix it). I cannot afford a new one.

 

[theblackdawn]

I have status 2 still.

 

[Awesomeslayerg]

Just tried this and it still didn't fix status 2. I get the error, but instead of continuing on the phone, it stops. It just hangs at 0%. I guess I may be sending this phone into LG (praying that they will fix it). I cannot afford a new one.

Weird well I DONT remember what I exactly did sorry guys

 

[theblackdawn]

Got my phone working did the steps 1-7 above but used zv6, then I went back to the flash tool and used the zv9 tot, board dl and it went through swimmingly.

 

[Awesomeslayerg]

Im going to update everyone that you CANNOT FLADH BACK TO Z5 OR ELSE YOU WILL BRICK YOUR PHONE!!

 

[2348z]

Where does the ZV9 tot file come from?

 

[barelynotlegal]

just got the ota notice this morning. i assuming its MM. is it pretty simple to downgrade back to zv6 (what phone came with stock). u have used lg up for fix bad flash but not comfortable with the lg flash method. aka open a comand window in lg root folder (method) is there a another flash method in case i get this "error 2"
thanks in advance.

 

[surge27]

So, tried downgrading to ZV6 from ZV9 and get stuck on Sprint boot image looping. Any suggestions on how to get it to boot correctly?

 

[6bowmans]

Has anyone successful downgraded back to ZV6 from ZV9?

 

[Bombillazo]

Im going to update everyone that you CANNOT FLADH BACK TO Z5 OR ELSE YOU WILL BRICK YOUR PHONE!!

So to be clear did you had ZV9 and did a successful downgrade to ZV6 using your steps??

 

[sandroiduser]

Well, yes, kind of painful since I got stock on the Sprint Spark boot image (no boot loop, just the image) . So the painful part is that I needed to do a factory reset from factory recovery (lost everything )... but it then went ok.

 

[Awesomeslayerg]

So, tried downgrading to ZV6 from ZV9 and get stuck on Sprint boot image looping. Any suggestions on how to get it to boot correctly?

Factory reset

 

[Bombillazo]

Factory reset

That did it. Can confirm it works, followed all steps in the downgrade section and effectively it got stuck on the Sprint Spark image, had to go into recovery mode, select wipedata/factory reset and reboot phone. Im back from ZV9 to ZV6.

 

[6bowmans]

Factory reset

Worked for me too...on ZV6 now and going back to UltraPop.

 

[d7racerx]

Already have stock mm. Can I still root it? Where do I go? I'm fine with zv9. Or has root not been figured out yet..

 

[barelynotlegal]

worked. downgraded stuck on spark, then factory reset. working and updating as we speak
thank you

 

[strskysun1]

I have been able to flash back wards and forth using both flashing tech. Using LG UP and the old flashing way. Don't know why it worked but it did. Also pulled out as soon as the phone hit 100%.