Thursday, 15 October 2015

Soft-bricked D820n a51_ul after upgrading just firmware from OTA



Hello,
i have single sim d820 (europe)

Code:


***************************
Software status: Modified
A51_UL PVT SHIP S-ON
hboot-3.19.0.0000
radio-01.01.010_U10305041_08.01.50512
os-2.10.401.2
***************************


Before i messed it up it was unlocked and rooted and S-ON, then i wanted to install OTA and i flashed firmware.zip extracted from OTA zip file (bad idea). Now i'm unable to get my phone working...
What i can do:
-enter bootloader
-fastboot commands
-enter recovery

What I've tried and didn't work:
-flash stock recovery, lock, flash RUUk44.zip via fastboot (signature verify fail)
-flash stock recovery, lock, flash lollipop OTA (signature verify fail)
-flash TWRP, restore k44 backup (bootloop after reboot from recovery)

The question is, if I would somehow obtain firmware from k44 stock, is it possible to downgrade on S-ON using "fastboot flash zip" and then restore backup or flash RUU?
I cannot find magical RUU.exe for this model there are only zip files...
Guys maybe someone can dump kitkat firmware i would be grateful...
I appreciate any idea, please help me solve it :(



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