Firmware Update Loop after trying to downgrade from ZVA via LGUP

[ktdilsiz]

Hello everyone,

I tried to downgrade my Spring ls992zva to zv5 and then zv6 and then zv8. In all these cases, I got "error 0x2bc invalid command" and it stopped at 10%. I tried with two different cables. It goes through antirollback but then stops when the update starts.

This put my phone into a loop situation. I have tried fixing with LG Bridge and LG Mobile Support Tool with no luck. LG Bridge doesn't recognize the connection and LG Support Tool says that I have that latest software and when I try "Update Recovery" option as some websites suggest, I get the error "Check out the model and serial number".

I have not fully tried LG Flash Tool or other flashing software throughly, only tried to stick with LGUP.

I have tried the update with ZV5 and ZV6 TOT files and for ZV8 I tried both KDZ and extracted DZ files. All same situation.

I do not necessarily want to downgrade my phone anymore. If possible, I want to just be able to boot it. I looked for ZV9 and ZVA software files but unfortunately couldn't find anything.

Please let me know if you can help. I am willing to pretty much anything reasonable since the phone is already softbricked. Only if I could get through the Firmware Update loop and start the phone once, it would probably solve my problem.

Thank you

TLDR: I got my lgls992va stuck in Firmware Update Loop after trying to flash ZV5 downgrade and looking for a fix, gave up on downgrade.

 

[TheMadScientist]

Hello everyone,

I tried to downgrade my Spring ls992zva to zv5 and then zv6 and then zv8. In all these cases, I got "error 0x2bc invalid command" and it stopped at 10%. I tried with two different cables. It goes through antirollback but then stops when the update starts.

This put my phone into a loop situation. I have tried fixing with LG Bridge and LG Mobile Support Tool with no luck. LG Bridge doesn't recognize the connection and LG Support Tool says that I have that latest software and when I try "Update Recovery" option as some websites suggest, I get the error "Check out the model and serial number".

I have not fully tried LG Flash Tool or other flashing software throughly, only tried to stick with LGUP.

I have tried the update with ZV5 and ZV6 TOT files and for ZV8 I tried both KDZ and extracted DZ files. All same situation.

I do not necessarily want to downgrade my phone anymore. If possible, I want to just be able to boot it. I looked for ZV9 and ZVA software files but unfortunately couldn't find anything.

Please let me know if you can help. I am willing to pretty much anything reasonable since the phone is already softbricked. Only if I could get through the Firmware Update loop and start the phone once, it would probably solve my problem.

Thank you

TLDR: I got my lgls992va stuck in Firmware Update Loop after trying to flash ZV5 downgrade and looking for a fix, gave up on downgrade.

im old skool I aint got a g5 yet might get one tomorrow but ive always used old flash tool
I don't know if theres g5 dlls for flashtool but the methods I assume would still work to use lgg2 firmware extractor to get the dll then try flash tool make sure to set setting at board dll though and now upgrade even on g4 it sends it to blue screen reset status 2. if not.

 

[ktdilsiz]

Thank you for the response, i'll play around with flash tool a bit but I would also appreciate some other solutions while I work on this Such us maybe how to fix LG Bridge connection or LG Support Tool error or another TOT that I may have missed.

 

[TheMadScientist]

Thank you for the response, i'll play around with flash tool a bit but I would also appreciate some other solutions while I work on this Such us maybe how to fix LG Bridge connection or LG Support Tool error or another TOT that I may have missed.

Lol i cant help u there ive never used either one of them. Been using flashtool since g2

 

[bilgerryan]

The only other thing I can think of is if you could get ahold of the ZVA update zip and flash it through stock recovery. I did it once on my S4, kinda hard to get it without root since it's downloaded to the /cache partition.