Needing some help here... my unit is a JY-HM121N2, FYT Sofia 3GR.
My unit was working flawlessly for about 3 years and then the software crashed while I was driving. Ok, no big deal I thought... wrong. GPS stopped working, apps wouldn't open anymore, even the Settings wouldn't open anymore. Tried what I could but without any app working or the Settings, but I couldn't really do much.
Did a full re-flash with stock then GTX (clean) via Custom. Seemed to work at first but Google services were crashing or not working properly (error 504)... Tried some more, tried to re-flash GTX via TWRP and all but something must've gone wrong.
Now it boots, but there's no launcher, just a black screen with the top with clock/etc and the dropdown works, but Settings does not. Can't launch any app if I can't reach them and ADB doesn't seem to work...
I can force it to flash from the thumb drive using the USB keyboard trick. However... I cannot get it to flash anything anymore as I get the infamous 5009_60.zip signature error.
Stock flash - signature error.
GTX flash - signature error.
"Recover" via 3 reset - black screen with the pink buttons, don't see anything happen other than multiple reboots but no changes after waiting for quite some time. It boots after a while but same behavior.
The screenshot is from before my last flash when things blew up.
Sorry to bother but let me summon the gurus @surfer63 @gtxaspec
Any ideas? Thank you...
UPDATE:
Well, after 3 days I managed to do it through a stupid way which actually worked.
1. Flashed the wrong MCU (5.25) to my 9.20 unit.
2. This forced my unit to show the MCU upgrade app post boot
3. Flashed a "bad" 9.20 MCU (because the original Joying one gave me the yellow bar)
4. When I clicked the magnifying glass to look for a MCU upgrade file, it actually opened the FIlemanager. From there, I could locate and install then run Custom.apk, which means I was able to install TWRP and then flash GTX back.
5. After reflashing GTX I managed to flash back my good MCU that Joying sent me to fix the yellow bar.
Great success!
I still get the 504 error if I try to install most apps on Google Play though. Trying to solve that one now...
UPDATE 2:
The 504 error went away when I reflashed GTX with a newer GApps, but I still couldn't install a few apps like Gboard or Swiftkey. It'd just say it failed to install after the download. So I had to install an alternative "playstore" *cough* xxxoide *cough* and from there I was able to install another keyboard other than the default (ended up installing Multiling because of the many configurations possible, the touch at 10% screen bottom is dead).
My unit was working flawlessly for about 3 years and then the software crashed while I was driving. Ok, no big deal I thought... wrong. GPS stopped working, apps wouldn't open anymore, even the Settings wouldn't open anymore. Tried what I could but without any app working or the Settings, but I couldn't really do much.
Did a full re-flash with stock then GTX (clean) via Custom. Seemed to work at first but Google services were crashing or not working properly (error 504)... Tried some more, tried to re-flash GTX via TWRP and all but something must've gone wrong.
Now it boots, but there's no launcher, just a black screen with the top with clock/etc and the dropdown works, but Settings does not. Can't launch any app if I can't reach them and ADB doesn't seem to work...
I can force it to flash from the thumb drive using the USB keyboard trick. However... I cannot get it to flash anything anymore as I get the infamous 5009_60.zip signature error.
Stock flash - signature error.
GTX flash - signature error.
"Recover" via 3 reset - black screen with the pink buttons, don't see anything happen other than multiple reboots but no changes after waiting for quite some time. It boots after a while but same behavior.
The screenshot is from before my last flash when things blew up.
Sorry to bother but let me summon the gurus @surfer63 @gtxaspec
Any ideas? Thank you...
UPDATE:
Well, after 3 days I managed to do it through a stupid way which actually worked.
1. Flashed the wrong MCU (5.25) to my 9.20 unit.
2. This forced my unit to show the MCU upgrade app post boot
3. Flashed a "bad" 9.20 MCU (because the original Joying one gave me the yellow bar)
4. When I clicked the magnifying glass to look for a MCU upgrade file, it actually opened the FIlemanager. From there, I could locate and install then run Custom.apk, which means I was able to install TWRP and then flash GTX back.
5. After reflashing GTX I managed to flash back my good MCU that Joying sent me to fix the yellow bar.
Great success!
I still get the 504 error if I try to install most apps on Google Play though. Trying to solve that one now...
UPDATE 2:
The 504 error went away when I reflashed GTX with a newer GApps, but I still couldn't install a few apps like Gboard or Swiftkey. It'd just say it failed to install after the download. So I had to install an alternative "playstore" *cough* xxxoide *cough* and from there I was able to install another keyboard other than the default (ended up installing Multiling because of the many configurations possible, the touch at 10% screen bottom is dead).
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