[Moto G 2015 Q&A, Help & Troubleshooting] nitu12345:
hello guyz i am having moto g3

recently i upgraded it to marshmallow but now i want it revert back to lollipop. My device is locked plus unrooted.

I followed all steps as mentioned here http://xdaforums.com/showthread.php?t=2542219

Here's what happen in command prompt-

C:\Users\Personal\Downloads\Compressed\XT1550_OSPREY_RETASIA_DS_2GB_5.1.1_LPI23

72-65_cid7_subsidy-DEFAULT_CFC.xml>fastboot flash recovery recovery.img

target reported max download size of 268435456 bytes

sending 'recovery' (16484 KB)...

OKAY [ 0.718s]

writing 'recovery'...

OKAY [ 0.952s]

finished. total time: 1.669s

C:\Users\Personal\Downloads\Compressed\XT1550_OSPREY_RETASIA_DS_2GB_5.1.1_LPI23

72-65_cid7_subsidy-DEFAULT_CFC.xml>fastboot flash partition gpt.bin

target reported max download size of 268435456 bytes

sending 'partition' (32 KB)...

OKAY [ 0.016s]

writing 'partition'...

(bootloader) Preflash validation failed

FAILED (remote failure)

finished. total time: 0.452s

C:\Users\Personal\Downloads\Compressed\XT1550_OSPREY_RETASIA_DS_2GB_5.1.1_LPI23

72-65_cid7_subsidy-DEFAULT_CFC.xml>fastboot flash bootloader bootloader.img

target reported max download size of 268435456 bytes

sending 'bootloader' (2546 KB)...

OKAY [ 0.109s]

writing 'bootloader'...

(bootloader) flashing sbl1 ...

(bootloader) flashing aboot ...

(bootloader) flashing tz ...

(bootloader) flashing hyp ...

(bootloader) flashing rpm ...

OKAY [ 1.638s]

finished. total time: 1.747s

C:\Users\Personal\Downloads\Compressed\XT1550_OSPREY_RETASIA_DS_2GB_5.1.1_LPI23

72-65_cid7_subsidy-DEFAULT_CFC.xml>fastboot flash logo logo.bin

target reported max download size of 268435456 bytes

sending 'logo' (917 KB)...

OKAY [ 0.047s]

writing 'logo'...

OKAY [ 0.078s]

finished. total time: 0.125s

C:\Users\Personal\Downloads\Compressed\XT1550_OSPREY_RETASIA_DS_2GB_5.1.1_LPI23

72-65_cid7_subsidy-DEFAULT_CFC.xml>fastboot flash boot boot.img

target reported max download size of 268435456 bytes

sending 'boot' (16384 KB)...

OKAY [ 0.686s]

writing 'boot'...

(bootloader) Preflash validation failed

FAILED (remote failure)

finished. total time: 1.232s

C:\Users\Personal\Downloads\Compressed\XT1550_OSPREY_RETASIA_DS_2GB_5.1.1_LPI23

72-65_cid7_subsidy-DEFAULT_CFC.xml>fastboot flash recovery recovery.img

target reported max download size of 268435456 bytes

sending 'recovery' (16484 KB)...

OKAY [ 0.706s]

writing 'recovery'...

OKAY [ 0.936s]

finished. total time: 1.642s

C:\Users\Personal\Downloads\Compressed\XT1550_OSPREY_RETASIA_DS_2GB_5.1.1_LPI23

72-65_cid7_subsidy-DEFAULT_CFC.xml>fastboot flash system system.img_sparsechunk

0

target reported max download size of 268435456 bytes

sending 'system' (232264 KB)...

OKAY [ 9.189s]

writing 'system'...

(bootloader) Invalid signed image

(bootloader) Preflash validation failed

FAILED (remote failure)

finished. total time: 9.663s

C:\Users\Personal\Downloads\Compressed\XT1550_OSPREY_RETASIA_DS_2GB_5.1.1_LPI23

72-65_cid7_subsidy-DEFAULT_CFC.xml>fastboot flash system system.img_sparsechunk

1

target reported max download size of 268435456 bytes

sending 'system' (261326 KB)...

OKAY [ 10.362s]

writing 'system'...

(bootloader) Invalid signed image

(bootloader) Preflash validation failed

FAILED (remote failure)

finished. total time: 10.418s

C:\Users\Personal\Downloads\Compressed\XT1550_OSPREY_RETASIA_DS_2GB_5.1.1_LPI23

72-65_cid7_subsidy-DEFAULT_CFC.xml>fastboot flash system system.img_sparsechunk

2

target reported max download size of 268435456 bytes

sending 'system' (241145 KB)...

OKAY [ 9.770s]

writing 'system'...

(bootloader) Invalid signed image

(bootloader) Preflash validation failed

FAILED (remote failure)

finished. total time: 9.817s

C:\Users\Personal\Downloads\Compressed\XT1550_OSPREY_RETASIA_DS_2GB_5.1.1_LPI23

72-65_cid7_subsidy-DEFAULT_CFC.xml>fastboot flash system system.img_sparsechunk

3

target reported max download size of 268435456 bytes

sending 'system' (255386 KB)...

OKAY [ 10.534s]

writing 'system'...

(bootloader) Invalid signed image

(bootloader) Preflash validation failed

FAILED (remote failure)

finished. total time: 10.631s

C:\Users\Personal\Downloads\Compressed\XT1550_OSPREY_RETASIA_DS_2GB_5.1.1_LPI23

72-65_cid7_subsidy-DEFAULT_CFC.xml>fastboot flash system system.img_sparsechunk

4

target reported max download size of 268435456 bytes

sending 'system' (257385 KB)...

OKAY [ 10.557s]

writing 'system'...

(bootloader) Invalid signed image

(bootloader) Preflash validation failed

FAILED (remote failure)

finished. total time: 10.607s

C:\Users\Personal\Downloads\Compressed\XT1550_OSPREY_RETASIA_DS_2GB_5.1.1_LPI23

72-65_cid7_subsidy-DEFAULT_CFC.xml>fastboot flash system system.img_sparsechunk

5

target reported max download size of 268435456 bytes

sending 'system' (240406 KB)...

OKAY [ 9.599s]

writing 'system'...

(bootloader) Invalid signed image

(bootloader) Preflash validation failed

FAILED (remote failure)

finished. total time: 9.653s

C:\Users\Personal\Downloads\Compressed\XT1550_OSPREY_RETASIA_DS_2GB_5.1.1_LPI23

72-65_cid7_subsidy-DEFAULT_CFC.xml>fastboot flash modem NON-HLOS.bin

target reported max download size of 268435456 bytes

sending 'modem' (36944 KB)...

OKAY [ 1.493s]

writing 'modem'...

OKAY [ 1.010s]

finished. total time: 2.507s

C:\Users\Personal\Downloads\Compressed\XT1550_OSPREY_RETASIA_DS_2GB_5.1.1_LPI23

72-65_cid7_subsidy-DEFAULT_CFC.xml>fastboot erase modemst1

erasing 'modemst1'...

OKAY [ 0.022s]

finished. total time: 0.025s

C:\Users\Personal\Downloads\Compressed\XT1550_OSPREY_RETASIA_DS_2GB_5.1.1_LPI23

72-65_cid7_subsidy-DEFAULT_CFC.xml>fastboot erase modemst2

erasing 'modemst2'...

OKAY [ 0.019s]

finished. total time: 0.022s

C:\Users\Personal\Downloads\Compressed\XT1550_OSPREY_RETASIA_DS_2GB_5.1.1_LPI23

72-65_cid7_subsidy-DEFAULT_CFC.xml>fastboot flash fsg fsg.mbn

target reported max download size of 268435456 bytes

sending 'fsg' (2035 KB)...

OKAY [ 0.097s]

writing 'fsg'...

OKAY [ 0.082s]

finished. total time: 0.187s

C:\Users\Personal\Downloads\Compressed\XT1550_OSPREY_RETASIA_DS_2GB_5.1.1_LPI23

72-65_cid7_subsidy-DEFAULT_CFC.xml>fastboot erase cache

erasing 'cache'...

OKAY [ 0.081s]

finished. total time: 0.085s

C:\Users\Personal\Downloads\Compressed\XT1550_OSPREY_RETASIA_DS_2GB_5.1.1_LPI23

72-65_cid7_subsidy-DEFAULT_CFC.xml>fastboot erase userdata

erasing 'userdata'...

OKAY [ 5.685s]

finished. total time: 5.688s

C:\Users\Personal\Downloads\Compressed\XT1550_OSPREY_RETASIA_DS_2GB_5.1.1_LPI23

72-65_cid7_subsidy-DEFAULT_CFC.xml>fastboot reboot

rebooting...

finished. total time: 0.007s

RESULT - Phone restart with all new marshmallow.

Plese tell me what i have to do now ?

Thankyou