ZVA toZV8 DOWNGRADE!!!!

[TheMadScientist]

So FIRST OFF IM NOT RESPONSIBLE FOR SOFTBRICKS HARDBRICKS,DAMAGE TO VEHICLES,BLOWN MOTORS OR ANYTHING LIKE THAT!!!
ZVB And higher DO NOT ATTEMPT AS HARBRICK CAN AND WILL OCCUR
Again ZVC and ZVB. Do Not Use This Guide. There is no firmware to recover from
If you upgraded to zvb/zvc or higher when available do not use this.
You will be stuck in firmware update. No system no recovery.


First off go over here and thank this man for lgup and his patch for it
https://forum.xda-developers.com/member.php?u=4530191

Second download ZV8 kdz here----->
https://drive.google.com/file/d/0BxacnHqAaZbKTWtNd0U2eDJVRDg/view?usp=sharing

Im copying his post here for lgup up patched setup.
So do all of this first
https://forum.xda-developers.com/showpost.php?p=73051003&postcount=32
Again thank this man hell thank em all

This is for full lgup options.
lgup version here>>>>>>>>
https://drive.google.com/file/d/0BxacnHqAaZbKSmJCaklVMUxQMWc/view?usp=sharing
lgup 8994 .dll version here>>>>>>>
https://drive.google.com/file/d/0BxacnHqAaZbKdmI3Nml3cHRSd1k/view?usp=sharing
lg up common .dll here>>>>>>>
https://mega.nz/#!TwNwUYwJ!ZTBcxmEkerLcp-2Ri66TOsZBf8LQl7qwoD2fmoJSCsc
lgup patch>>>>>
https://forum.xda-developers.com/attachment.php?attachmentid=4213482&d=1500215045
Note one of the .dlls are for the lg g4 but its needed.
MUST HAVE DOWNLOADED VERSIONS IN LINKS PROVIDED OR WONT WORK.

2. Prob a pretty good idea to do ure backups to sd card now. however u do them thats on you.

3. Factory reset.

4. Put g5 in download mode .

5. Open lgup and set to upgrade option select location of kdz and start.

6. Do not mess with it til device has fully rebooted.
7. success now back on ZV8

 

[TheMadScientist]

reserved

 

[majedalanni]

So FIRST OFF IM NOT RESPONSIBLE FOR SOFTBRICKS HARDBRICKS,DAMAGE TO VEHICLES,BLOWN MOTORS OR ANYTHING LIKE THAT!!!

First off go over here and thank this man for lgup and his patch for it
https://forum.xda-developers.com/member.php?u=4530191

Second download ZV8 kdz here----->
https://drive.google.com/file/d/0BxacnHqAaZbKTWtNd0U2eDJVRDg/view?usp=sharing

Im copying his post here for lgup up patched setup.
So do all of this first
https://forum.xda-developers.com/showpost.php?p=73051003&postcount=32
Again thank this man hell thank em all

This is for full lgup options.
lgup version here>>>>>>>>
https://drive.google.com/file/d/0BxacnHqAaZbKSmJCaklVMUxQMWc/view?usp=sharing
lgup 8994 .dll version here>>>>>>>
https://drive.google.com/file/d/0BxacnHqAaZbKdmI3Nml3cHRSd1k/view?usp=sharing
lg up common .dll here>>>>>>>
https://mega.nz/#!TwNwUYwJ!ZTBcxmEkerLcp-2Ri66TOsZBf8LQl7qwoD2fmoJSCsc
lgup patch>>>>>
https://forum.xda-developers.com/attachment.php?attachmentid=4213482&d=1500215045
Note one of the .dlls are for the lg g4 but its needed.
MUST HAVE DOWNLOADED VERSIONS IN LINKS PROVIDED OR WONT WORK.

2. Prob a pretty good idea to do ure backups to sd card now. however u do them thats on you.

3. Factory reset.

4. Put g5 in download mode .

5. Open lgup and set to upgrade option select location of kdz and start.

6. Do not mess with it til device has fully rebooted.
7. success now back on ZV8

I'm on zv9 would this work? And would dirty cow work on zv8 to root the device?

 

[TheMadScientist]

I'm on zv9 would this work? And would dirty cow work on zv8 to root the device?

im assuming it would work to goto zv8 dont try no lower i bricked mine on zv6 not from anti rollback but another issue i had
i dont know about the dirty cow to much maybe someone else could answer that one

 

[bilgerryan]

im assuming it would work to goto zv8 dont try no lower i bricked mine on zv6 not from anti rollback but another issue i had
i dont know about the dirty cow to much maybe someone else could answer that one

Great news about the downgrading, sucky news about your device. Hope you get it back running.

 

[TheMadScientist]

Great news about the downgrading, sucky news about your device. Hope you get it back running.

I flashed the zv6 tot and kept getting an error but like said i was passing the antirollback. I think lgup doesnt like the zv6 tot. But 5 times i wiped the partitions as long as i didnt reboot and directly reflashed zv8 in the same session i was good.
And it hung the last time and i nudged my crappy usb cable like a idiot i rebooted
I am in 9008. No worries. I got my old s5 up and runnin. I think of i can fmake a debrick img just like other lgs i can boot from sd card. I put g5 in the drawer for a few days to think about it.

 

[WARpig5]

It's always great to be able to downgrade, but what would this be useful for? For a possible root method?

 

[TheMadScientist]

It's always great to be able to downgrade, but what would this be useful for? For a possible root method?

at least a restore if any thing go afoul trying to root. as of now no root am trying to fix my g5 and attempt to get to zv6 but dont try yet not safe not due to anti roll back but an issue i havent found yet

 

[bilgerryan]

It's always great to be able to downgrade, but what would this be useful for? For a possible root method?

Or for people like me who had the G5 given to me flashed to Boost. I can't use it on a CDMA network unless it is flashed back to stock. They did away with the plan my friend was on... it was given to me on ZV9. Very helpful.

 

[bilgerryan]

at least a restore if any thing go afoul trying to root. as of now no root am trying to fix my g5 and attempt to get to zv6 but dont try yet not safe not due to anti roll back but an issue i havent found yet

Maybe this will help- https://forum.xda-developers.com/showthread.php?p=68479183

 

[TheMadScientist]

Maybe this will help- https://forum.xda-developers.com/showthread.php?p=68479183

Thats what im working on now adapting this to the sprint g5. I got kdzs extracted gonna try a diffrent zv6 tot 1st one i got i think is a bad download.
Just been real busy to try. And i dont brick my only phone.so im not all desperate and freaking out. Thats normally why im not scrared to test stuff out. Its just a phone. Yea i loved it but i know one day even 3 or 4 years from now might be fixable.

 

[bilgerryan]

Just throwing this out there, when I did this Google Play Services kept force closing, I uninstalled Google Play Services for Instant Apps and it stopped. Went from ZVA to ZV8 with no other problems though.

 

[TheMadScientist]

Just throwing this out there, when I did this Google Play Services kept force closing, I uninstalled Google Play Services for Instant Apps and it stopped. Went from ZVA to ZV8 with no other problems though.

First time i went to zv8 from a i had a few force closes all was solved from a factory reset in zv8 after first boot. Second first boot was succsessful

 

[sagorieli13]

failure

hello, i flashed my ls992 with this steps, on 81% flashing phone did not restarted, but pregress in lg up was raised, finally it finished 100%. the phone screen was black. (still)
when i remove battery and press power button i get only vibration but screen is still dark(black).
any ideas? any help?
please dont hesitate

 

[bilgerryan]

hello, i flashed my ls992 with this steps, on 81% flashing phone did not restarted, but pregress in lg up was raised, finally it finished 100%. the phone screen was black. (still)
when i remove battery and press power button i get only vibration but screen is still dark(black).
any ideas? any help?
please dont hesitate

Were you on ZVC firmware when you started this process?

 

[sagorieli13]

ZVA

no i was on ZVA

 

[TheMadScientist]

no i was on ZVA

Dont know what u did exactly but if its black and not doing anything ure hard bricked and there is no fix yet

 

[TheMadScientist]

hello, i flashed my ls992 with this steps, on 81% flashing phone did not restarted, but pregress in lg up was raised, finally it finished 100%. the phone screen was black. (still)
when i remove battery and press power button i get only vibration but screen is still dark(black).
any ideas? any help?
please dont hesitate

The screen shoulda never been black. Shoulda been dl mode the whole time. Plug into pc and look in devoce manager and see if its the qloader9008.
Also if it made it to 100% there shouldnt have been no issues. As the fone usually reboots when pc shows around 80 to 85% try looking to see if u can boot recovery fac reset or dl mode any more....

 

[sagorieli13]

thank you, is there any zva to re flash it?
or how to get boot back?
when i connect it to pc in device manager only this appairs "LGE AndroidNET USB Serial Port (COM41)"

---------- Post added at 09:03 PM ---------- Previous post was at 08:58 PM ----------

i had before the second phone and it was in QDload mode after i tried to downgrade ZVC
but now, on this phone, i was on zva and tried to flash on ZV8 with there steps you wrote.
after 81% phone turned off, i thougt it was restarting but it becomed black. after 10 minutes i unplugged it and reconnect

 

[TheMadScientist]

thank you, is there any zva to re flash it?
or how to get boot back?
when i connect it to pc in device manager only this appairs "LGE AndroidNET USB Serial Port (COM41)"

---------- Post added at 09:03 PM ---------- Previous post was at 08:58 PM ----------

i had before the second phone and it was in QDload mode after i tried to downgrade ZVC
but now, on this phone, i was on zva and tried to flash on ZV8 with there steps you wrote.
after 81% phone turned off, i thougt it was restarting but it becomed black. after 10 minutes i unplugged it and reconnect

I am currently at work i will be home within the hour and will look for zva