I had been using a custom rom for quite sometime but now i want to return stock rom
I downloaded the firmware.
Guide im using is https://forum.xda-developers.com/201...ctory-t3187750
but when i flash gpt.bin it says
target max-sparse-size: 256MB sending 'partition' (32 KB)... OKAY [ 0.007s] writing 'partition'... (bootloader) Preflash validation failed FAILED (remote failure) finished. total time: 0.366s
this is my only working device.