I have a s4 i9505 that i rooted, installed custom recovery, and installed the most recent cyanogen mod 12.1 snapshot (cm-12.1-20151117-SNAPSHOT-YOG7DAO1JN-jfltexx.zip )
everything installed perfectly and works fine, except for the GPS, i have read up that restoring to a stock rom and getting a lock with GPS, then flashing cyanogen mod while it has a lock via GPS will fix the problem, but i am unable to downgrade to a stock rom as the android version i have flashed is 5.1.1, and the most recent stock rom is 5.0.1, i have tried to flash with odin and i get an error saying "fail(auth)"
my phone says "write protection: enabled" in download mode and i have read that this means the bootloader is locked, so i can only downgrade if i unlock the bootloader.
does anyone have any ideas on how to do this? i have tried using adb and fastboot but my device does not support fastboot, it only has recovery/download
everything installed perfectly and works fine, except for the GPS, i have read up that restoring to a stock rom and getting a lock with GPS, then flashing cyanogen mod while it has a lock via GPS will fix the problem, but i am unable to downgrade to a stock rom as the android version i have flashed is 5.1.1, and the most recent stock rom is 5.0.1, i have tried to flash with odin and i get an error saying "fail(auth)"
my phone says "write protection: enabled" in download mode and i have read that this means the bootloader is locked, so i can only downgrade if i unlock the bootloader.
does anyone have any ideas on how to do this? i have tried using adb and fastboot but my device does not support fastboot, it only has recovery/download
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