[Moto G4 Plus Guides, News, & Discussion] Bunny Joel:
I have tried to downgrade from N to MM which doesnt happened i tried through adb. While installing it showed errors image partition_gpt failed and signed failed verification. Some people said that i have to unlock the bootloader to downgrade my mobile software and some claimed I dont have to.

Due to march security patch level i cant play pokemon so I want to downgrade to nougat december patch or to marshamallow. I dont know what i should do. If i unlock bootloader which voids my ph warranty. Can u please help me with instructions to downgrade N to MM or to N december security patch.

I live in india and using Moto g4 plus XT1643 .

---------- Post added at 06:42 PM ---------- Previous post was at 06:16 PM ----------

fastboot flash logo logo.bin

fastboot flash boot boot.img

fastboot flash recovery recovery.img

fastboot flash dsp adspso.bin

fastboot flash oem oem.img

fastboot flash system system.img_sparsechunk.0

fastboot flash system system.img_sparsechunk.1

fastboot flash system system.img_sparsechunk.2

fastboot flash system system.img_sparsechunk.3

fastboot flash system system.img_sparsechunk.4

fastboot flash system system.img_sparsechunk.5

fastboot flash system system.img_sparsechunk.6

fastboot flash system system.img_sparsechunk.7

fastboot flash modem NON-HLOS.bin

fastboot erase modemst1

fastboot erase modemst2

fastboot flash fsg fsg.mbn

fastboot erase cache

fastboot erase userdata

fastboot erase customize

fastboot erase clogo

fastboot reboot

C:\adb>fastboot flash logo logo.bin

target reported max download size of 536870912 bytes

sending 'logo' (1848 KB)...

OKAY [ 0.062s]

writing 'logo'...

OKAY [ 0.062s]

finished. total time: 0.127s

C:\adb>fastboot flash boot boot.img

target reported max download size of 536870912 bytes

sending 'boot' (16384 KB)...

OKAY [ 0.520s]

writing 'boot'...

(bootloader) Security version downgrade

(bootloader) Image boot failed validation

(bootloader) Preflash validation failed

FAILED (remote failure)

finished. total time: 0.689s

C:\adb>fastboot flash recovery recovery.img

target reported max download size of 536870912 bytes

sending 'recovery' (16484 KB)...

OKAY [ 0.524s]

writing 'recovery'...

(bootloader) Security version downgrade

(bootloader) Image recovery failed validation

(bootloader) Preflash validation failed

FAILED (remote failure)

finished. total time: 0.697s

C:\adb>fastboot flash dsp adspso.bin

target reported max download size of 536870912 bytes

sending 'dsp' (16384 KB)...

OKAY [ 0.520s]

writing 'dsp'...

OKAY [ 0.382s]

finished. total time: 0.905s

C:\adb>fastboot flash oem oem.img

target reported max download size of 536870912 bytes

sending 'oem' (124713 KB)...

OKAY [ 3.928s]

writing 'oem'...

(bootloader) Security version downgrade

(bootloader) Image o failed validation

(bootloader) Invalid signed image

(bootloader) Preflash validation failed

FAILED (remote failure)

finished. total time: 3.992s

C:\adb>fastboot flash system system.img_sparsechunk.0

target reported max download size of 536870912 bytes

sending 'system' (261790 KB)...

OKAY [ 8.239s]

writing 'system'...

(bootloader) Security version downgrade

(bootloader) Image s failed validation

(bootloader) Invalid signed image

(bootloader) Preflash validation failed

FAILED (remote failure)

finished. total time: 8.311s

C:\adb>fastboot flash system system.img_sparsechunk.1

target reported max download size of 536870912 bytes

sending 'system' (252965 KB)...

OKAY [ 7.966s]

writing 'system'...

(bootloader) Invalid signed image

(bootloader) Preflash validation failed

FAILED (remote failure)

finished. total time: 7.983s

C:\adb>fastboot flash system system.img_sparsechunk.2

target reported max download size of 536870912 bytes

sending 'system' (255295 KB)...

OKAY [ 8.034s]

writing 'system'...

(bootloader) Invalid signed image

(bootloader) Preflash validation failed

FAILED (remote failure)

finished. total time: 8.052s