[Moto G 2015 Q&A, Help & Troubleshooting] gridikoelie:
Damn...didn't work.

Fails at "fastboot flash partition gpt.bin" with the US Retail version

These are my command results:

C:\Users\User\Downloads\SOFTWARE\Other\OS'S\Moto G3 (XT1540, osprey retus)\XT1540_OSPREY_RETUS_6.0_MPI24.65-25.1_cid9_subsidy-DEFAULT_CFC.xml>mfastboot oem fb_mode_set

...

OKAY [ 0.112s]

finished. total time: 0.112s

C:\Users\User\Downloads\SOFTWARE\Other\OS'S\Moto G3 (XT1540, osprey retus)\XT1540_OSPREY_RETUS_6.0_MPI24.65-25.1_cid9_subsidy-DEFAULT_CFC.xml>mfastboot flash partition gpt.bin

target max-sparse-size: 256MB

sending 'partition' (32 KB)...

OKAY [ 0.004s]

writing 'partition'...

(bootloader) Preflash validation failed

FAILED (remote failure)

finished. total time: 0.408s

C:\Users\User\Downloads\SOFTWARE\Other\OS'S\Moto G3 (XT1540, osprey retus)\XT1540_OSPREY_RETUS_6.0_MPI24.65-25.1_cid9_subsidy-DEFAULT_CFC.xml>mfastboot flash bootloader bootloader.img

target max-sparse-size: 256MB

sending 'bootloader' (2546 KB)...

OKAY [ 0.088s]

writing 'bootloader'...

(bootloader) flashing sbl1 ...

(bootloader) flashing aboot ...

(bootloader) flashing tz ...

(bootloader) flashing hyp ...

(bootloader) flashing rpm ...

OKAY [ 1.838s]

finished. total time: 1.930s

C:\Users\User\Downloads\SOFTWARE\Other\OS'S\Moto G3 (XT1540, osprey retus)\XT1540_OSPREY_RETUS_6.0_MPI24.65-25.1_cid9_subsidy-DEFAULT_CFC.xml>mfastboot flash logo logo.bin

target max-sparse-size: 256MB

sending 'logo' (1352 KB)...

OKAY [ 0.048s]

writing 'logo'...

OKAY [ 0.081s]

finished. total time: 0.137s

C:\Users\User\Downloads\SOFTWARE\Other\OS'S\Moto G3 (XT1540, osprey retus)\XT1540_OSPREY_RETUS_6.0_MPI24.65-25.1_cid9_subsidy-DEFAULT_CFC.xml>mfastboot flash boot boot.img

target max-sparse-size: 256MB

sending 'boot' (16384 KB)...

OKAY [ 0.519s]

writing 'boot'...

(bootloader) Preflash validation failed

FAILED (remote failure)

finished. total time: 1.049s

C:\Users\User\Downloads\SOFTWARE\Other\OS'S\Moto G3 (XT1540, osprey retus)\XT1540_OSPREY_RETUS_6.0_MPI24.65-25.1_cid9_subsidy-DEFAULT_CFC.xml>mfastboot flash recovery recovery.img

target max-sparse-size: 256MB

sending 'recovery' (16484 KB)...

OKAY [ 0.521s]

writing 'recovery'...

(bootloader) Preflash validation failed

FAILED (remote failure)

finished. total time: 1.078s

C:\Users\User\Downloads\SOFTWARE\Other\OS'S\Moto G3 (XT1540, osprey retus)\XT1540_OSPREY_RETUS_6.0_MPI24.65-25.1_cid9_subsidy-DEFAULT_CFC.xml>mfastboot flash system system.img_sparsechunk.0

target max-sparse-size: 256MB

sending 'system' (260721 KB)...

OKAY [ 8.240s]

writing 'system'...

(bootloader) Invalid signed image

(bootloader) Preflash validation failed

FAILED (remote failure)

finished. total time: 8.689s

C:\Users\User\Downloads\SOFTWARE\Other\OS'S\Moto G3 (XT1540, osprey retus)\XT1540_OSPREY_RETUS_6.0_MPI24.65-25.1_cid9_subsidy-DEFAULT_CFC.xml>mfastboot flash system system.img_sparsechunk.1

target max-sparse-size: 256MB

sending 'system' (261542 KB)...

OKAY [ 8.267s]

writing 'system'...

(bootloader) Invalid signed image

(bootloader) Preflash validation failed

FAILED (remote failure)

finished. total time: 8.317s

C:\Users\User\Downloads\SOFTWARE\Other\OS'S\Moto G3 (XT1540, osprey retus)\XT1540_OSPREY_RETUS_6.0_MPI24.65-25.1_cid9_subsidy-DEFAULT_CFC.xml>mfastboot flash system system.img_sparsechunk.2

target max-sparse-size: 256MB

sending 'system' (262143 KB)...

OKAY [ 8.300s]

writing 'system'...

(bootloader) Invalid signed image

(bootloader) Preflash validation failed

FAILED (remote failure)

finished. total time: 8.364s

C:\Users\User\Downloads\SOFTWARE\Other\OS'S\Moto G3 (XT1540, osprey retus)\XT1540_OSPREY_RETUS_6.0_MPI24.65-25.1_cid9_subsidy-DEFAULT_CFC.xml>mfastboot flash system system.img_sparsechunk.3

target max-sparse-size: 256MB

sending 'system' (246551 KB)...

OKAY [ 7.790s]

writing 'system'...

(bootloader) Invalid signed image

(bootloader) Preflash validation failed

FAILED (remote failure)

finished. total time: 7.861s

C:\Users\User\Downloads\SOFTWARE\Other\OS'S\Moto G3 (XT1540, osprey retus)\XT1540_OSPREY_RETUS_6.0_MPI24.65-25.1_cid9_subsidy-DEFAULT_CFC.xml>mfastboot flash system system.img_sparsechunk.4

target max-sparse-size: 256MB

sending 'system' (262142 KB)...

OKAY [ 8.285s]

writing 'system'...

(bootloader) Invalid signed image

(bootloader) Preflash validation failed

FAILED (remote failure)

finished. total time: 8.329s

C:\Users\User\Downloads\SOFTWARE\Other\OS'S\Moto G3 (XT1540, osprey retus)\XT1540_OSPREY_RETUS_6.0_MPI24.65-25.1_cid9_subsidy-DEFAULT_CFC.xml>mfastboot flash system system.img_sparsechunk.5

target max-sparse-size: 256MB

sending 'system' (262141 KB)...

OKAY [ 8.269s]

writing 'system'...

(bootloader) Invalid signed image

(bootloader) Preflash validation failed

FAILED (remote failure)

finished. total time: 8.309s

C:\Users\User\Downloads\SOFTWARE\Other\OS'S\Moto G3 (XT1540, osprey retus)\XT1540_OSPREY_RETUS_6.0_MPI24.65-25.1_cid9_subsidy-DEFAULT_CFC.xml>mfastboot flash system system.img_sparsechunk.6

target max-sparse-size: 256MB

sending 'system' (117920 KB)...

OKAY [ 3.731s]

writing 'system'...

(bootloader) Invalid signed image

(bootloader) Preflash validation failed

FAILED (remote failure)

finished. total time: 3.766s

C:\Users\User\Downloads\SOFTWARE\Other\OS'S\Moto G3 (XT1540, osprey retus)\XT1540_OSPREY_RETUS_6.0_MPI24.65-25.1_cid9_subsidy-DEFAULT_CFC.xml>mfastboot flash system system.img_sparsechunk.7

target max-sparse-size: 256MB

error: cannot load 'system.img_sparsechunk.7': No error

C:\Users\User\Downloads\SOFTWARE\Other\OS'S\Moto G3 (XT1540, osprey retus)\XT1540_OSPREY_RETUS_6.0_MPI24.65-25.1_cid9_subsidy-DEFAULT_CFC.xml>mfastboot flash system system.img_sparsechunk.8

target max-sparse-size: 256MB

error: cannot load 'system.img_sparsechunk.8': No error

C:\Users\User\Downloads\SOFTWARE\Other\OS'S\Moto G3 (XT1540, osprey retus)\XT1540_OSPREY_RETUS_6.0_MPI24.65-25.1_cid9_subsidy-DEFAULT_CFC.xml>mfastboot flash modem NON-HLOS.bin

target max-sparse-size: 256MB

sending 'modem' (36984 KB)...

OKAY [ 1.188s]

writing 'modem'...

OKAY [ 0.993s]

finished. total time: 2.189s

C:\Users\User\Downloads\SOFTWARE\Other\OS'S\Moto G3 (XT1540, osprey retus)\XT1540_OSPREY_RETUS_6.0_MPI24.65-25.1_cid9_subsidy-DEFAULT_CFC.xml>mfastboot erase modemst1

erasing 'modemst1'...

OKAY [ 0.016s]

finished. total time: 0.016s

C:\Users\User\Downloads\SOFTWARE\Other\OS'S\Moto G3 (XT1540, osprey retus)\XT1540_OSPREY_RETUS_6.0_MPI24.65-25.1_cid9_subsidy-DEFAULT_CFC.xml>mfastboot erase modemst2

erasing 'modemst2'...

OKAY [ 0.016s]

finished. total time: 0.016s

C:\Users\User\Downloads\SOFTWARE\Other\OS'S\Moto G3 (XT1540, osprey retus)\XT1540_OSPREY_RETUS_6.0_MPI24.65-25.1_cid9_subsidy-DEFAULT_CFC.xml>mfastboot flash fsg fsg.mbn

target max-sparse-size: 256MB

sending 'fsg' (2159 KB)...

OKAY [ 0.072s]

writing 'fsg'...

OKAY [ 0.084s]

finished. total time: 0.157s

C:\Users\User\Downloads\SOFTWARE\Other\OS'S\Moto G3 (XT1540, osprey retus)\XT1540_OSPREY_RETUS_6.0_MPI24.65-25.1_cid9_subsidy-DEFAULT_CFC.xml>mfastboot erase cache

erasing 'cache'...

OKAY [ 0.016s]

finished. total time: 0.016s

C:\Users\User\Downloads\SOFTWARE\Other\OS'S\Moto G3 (XT1540, osprey retus)\XT1540_OSPREY_RETUS_6.0_MPI24.65-25.1_cid9_subsidy-DEFAULT_CFC.xml>mfastboot erase userdata

erasing 'userdata'...

OKAY [ 0.045s]

finished. total time: 0.045s

C:\Users\User\Downloads\SOFTWARE\Other\OS'S\Moto G3 (XT1540, osprey retus)\XT1540_OSPREY_RETUS_6.0_MPI24.65-25.1_cid9_subsidy-DEFAULT_CFC.xml>mfastboot erase customize

erasing 'customize'...

OKAY [ 0.016s]

finished. total time: 0.016s

C:\Users\User\Downloads\SOFTWARE\Other\OS'S\Moto G3 (XT1540, osprey retus)\XT1540_OSPREY_RETUS_6.0_MPI24.65-25.1_cid9_subsidy-DEFAULT_CFC.xml>mfastboot erase clogo

erasing 'clogo'...

OKAY [ 0.032s]

finished. total time: 0.032s

C:\Users\User\Downloads\SOFTWARE\Other\OS'S\Moto G3 (XT1540, osprey retus)\XT1540_OSPREY_RETUS_6.0_MPI24.65-25.1_cid9_subsidy-DEFAULT_CFC.xml>mfastboot oem fb_mode_clear

...

OKAY [ 0.008s]

finished. total time: 0.009s

C:\Users\User\Downloads\SOFTWARE\Other\OS'S\Moto G3 (XT1540, osprey retus)\XT1540_OSPREY_RETUS_6.0_MPI24.65-25.1_cid9_subsidy-DEFAULT_CFC.xml>mfastboot reboot

rebooting...

finished. total time: 0.008s

C:\Users\User\Downloads\SOFTWARE\Other\OS'S\Moto G3 (XT1540, osprey retus)\XT1540_OSPREY_RETUS_6.0_MPI24.65-25.1_cid9_subsidy-DEFAULT_CFC.xml>mfastboot flash fsg fsg.mbn

< waiting for device >

target max-sparse-size: 256MB

sending 'fsg' (2159 KB)...

OKAY [ 0.154s]

writing 'fsg'...

OKAY [ 0.382s]

finished. total time: 0.540s

C:\Users\User\Downloads\SOFTWARE\Other\OS'S\Moto G3 (XT1540, osprey retus)\XT1540_OSPREY_RETUS_6.0_MPI24.65-25.1_cid9_subsidy-DEFAULT_CFC.xml>mfastboot erase cache

erasing 'cache'...

OKAY [ 0.017s]

finished. total time: 0.017s

C:\Users\User\Downloads\SOFTWARE\Other\OS'S\Moto G3 (XT1540, osprey retus)\XT1540_OSPREY_RETUS_6.0_MPI24.65-25.1_cid9_subsidy-DEFAULT_CFC.xml>mfastboot erase userdata

erasing 'userdata'...

OKAY [ 0.087s]

finished. total time: 0.090s

C:\Users\User\Downloads\SOFTWARE\Other\OS'S\Moto G3 (XT1540, osprey retus)\XT1540_OSPREY_RETUS_6.0_MPI24.65-25.1_cid9_subsidy-DEFAULT_CFC.xml>mfastboot erase customize

erasing 'customize'...

OKAY [ 0.016s]

finished. total time: 0.016s

C:\Users\User\Downloads\SOFTWARE\Other\OS'S\Moto G3 (XT1540, osprey retus)\XT1540_OSPREY_RETUS_6.0_MPI24.65-25.1_cid9_subsidy-DEFAULT_CFC.xml>mfastboot erase clogo

erasing 'clogo'...

OKAY [ 0.078s]

finished. total time: 0.081s

C:\Users\User\Downloads\SOFTWARE\Other\OS'S\Moto G3 (XT1540, osprey retus)\XT1540_OSPREY_RETUS_6.0_MPI24.65-25.1_cid9_subsidy-DEFAULT_CFC.xml>mfastboot oem fb_mode_clear

...

OKAY [ 0.000s]

finished. total time: 0.004s

C:\Users\User\Downloads\SOFTWARE\Other\OS'S\Moto G3 (XT1540, osprey retus)\XT1540_OSPREY_RETUS_6.0_MPI24.65-25.1_cid9_subsidy-DEFAULT_CFC.xml>mfastboot reboot

rebooting...

finished. total time: 0.008s

Can this be a driver issue? My Windows 10 laptop sees my device as "Mot Composite ADB Interface" and get Connected USB not recognized when rebooting bootloader