[Moto Z2 Play  Questions & Answers] Mark2014:
Sure. it's eásy to use.

many FAILED errors like below: (few first commands can't copy, but i sure do it at all)

I was used mfastboot like your suggést

D:\Dev\mfastboot>mfastboot flash dsp adspso.bin

target max-sparse-size: 256MB

sending 'dsp' (16384 KB)...

OKAY [ 0.350s]

writing 'dsp'...

OKAY [ 0.210s]

finished. total time: 0.560s

D:\Dev\mfastboot>mfastboot flash logo logo.bin

target max-sparse-size: 256MB

sending 'logo' (2192 KB)...

OKAY [ 0.060s]

writing 'logo'...

OKAY [ 0.113s]

finished. total time: 0.175s

D:\Dev\mfastboot>mfastboot flash boot boot.img

target max-sparse-size: 256MB

sending 'boot' (16384 KB)...

OKAY [ 0.382s]

writing 'boot'...

(bootloader) Image signed with key bad key

OKAY [ 0.333s]

finished. total time: 0.715s

D:\Dev\mfastboot>mfastboot flash recovery recovery.img

target max-sparse-size: 256MB

sending 'recovery' (20580 KB)...

OKAY [ 0.470s]

writing 'recovery'...

(bootloader) Image signed with key bad key

OKAY [ 0.420s]

finished. total time: 0.890s

D:\Dev\mfastboot>mfastboot flash system system.img_sparsechunk.0

target max-sparse-size: 256MB

Sparse-Flash is enabled!

sending sparse 'system' (262142 KB)...

OKAY [ 5.840s]

writing 'system'...

OKAY [ 2.657s]

sending sparse 'system' (254988 KB)...

OKAY [ 5.703s]

writing 'system'...

OKAY [ 2.383s]

finished. total time: 16.583s

D:\Dev\mfastboot>mfastboot flash system system.img_sparsechunk.1

target max-sparse-size: 256MB

Sparse-Flash is enabled!

sending sparse 'system' (261720 KB)...

OKAY [ 5.927s]

writing 'system'...

OKAY [ 2.883s]

sending sparse 'system' (235451 KB)...

OKAY [ 5.242s]

writing 'system'...

OKAY [ 1.971s]

finished. total time: 16.143s

D:\Dev\mfastboot>mfastboot flash system system.img_sparsechunk.2

target max-sparse-size: 256MB

Sparse-Flash is enabled!

sending sparse 'system' (250755 KB)...

OKAY [ 5.617s]

writing 'system'...

OKAY [ 2.280s]

sending sparse 'system' (249116 KB)...

OKAY [ 5.646s]

writing 'system'...

OKAY [ 2.894s]

sending sparse 'system' (17572 KB)...

OKAY [ 0.396s]

writing 'system'...

OKAY [ 0.170s]

finished. total time: 17.003s

D:\Dev\mfastboot>mfastboot flash system system.img_sparsechunk.3

target max-sparse-size: 256MB

Sparse-Flash is enabled!

sending sparse 'system' (252175 KB)...

OKAY [ 5.637s]

writing 'system'...

OKAY [ 2.203s]

sending sparse 'system' (254544 KB)...

OKAY [ 5.667s]

writing 'system'...

OKAY [ 2.063s]

sending sparse 'system' (13700 KB)...

OKAY [ 0.299s]

writing 'system'...

OKAY [ 0.130s]

finished. total time: 16.010s

D:\Dev\mfastboot>mfastboot flash system system.img_sparsechunk.4

target max-sparse-size: 256MB

Sparse-Flash is enabled!

sending sparse 'system' (259627 KB)...

OKAY [ 5.795s]

writing 'system'...

OKAY [ 2.333s]

sending sparse 'system' (260620 KB)...

OKAY [ 5.823s]

writing 'system'...

OKAY [ 2.237s]

finished. total time: 16.188s

D:\Dev\mfastboot>mfastboot flash system system.img_sparsechunk.5

target max-sparse-size: 256MB

Sparse-Flash is enabled!

sending sparse 'system' (253704 KB)...

OKAY [ 5.770s]

writing 'system'...

OKAY [ 2.806s]

sending sparse 'system' (250087 KB)...

OKAY [ 5.583s]

writing 'system'...

OKAY [ 2.317s]

sending sparse 'system' (17072 KB)...

OKAY [ 0.390s]

writing 'system'...

OKAY [ 0.163s]

finished. total time: 17.039s

D:\Dev\mfastboot>mfastboot flash system system.img_sparsechunk.6

target max-sparse-size: 256MB

Sparse-Flash is enabled!

sending sparse 'system' (230784 KB)...

OKAY [ 5.127s]

writing 'system'...

OKAY [ 1.958s]

sending sparse 'system' (45248 KB)...

OKAY [ 0.995s]

writing 'system'...

OKAY [ 0.380s]

finished. total time: 8.470s

D:\Dev\mfastboot>mfastboot flash oem oem.img

target max-sparse-size: 256MB

sending 'oem' (232919 KB)...

OKAY [ 4.952s]

writing 'oem'...

OKAY [ 2.041s]

finished. total time: 6.995s

D:\Dev\mfastboot>mfastboot erase carrier

erasing 'carrier'...

OKAY [ 0.080s]

finished. total time: 0.080s

D:\Dev\mfastboot>mfastboot erase cache

erasing 'cache'...

OKAY [ 0.020s]

finished. total time: 0.020s

D:\Dev\mfastboot>mfastboot erase userdata

erasing 'userdata'...

OKAY [ 4.750s]

finished. total time: 4.750s

D:\Dev\mfastboot>mfastboot erase DDR

erasing 'DDR'...

OKAY [ 0.010s]

finished. total time: 0.010s

D:\Dev\mfastboot>mfastboot oem fb_mode_clear

...

OKAY [ -0.000s]

finished. total time: -0.000s

D:\Dev\mfastboot>mfastboot oem lock

...

(bootloader) WARNING: This command erases all user data.

(bootloader) Please re-run this command to continue.

OKAY [ 0.010s]

finished. total time: 0.010s

D:\Dev\mfastboot>mfastboot oem lock

...

(bootloader) Flash valid Android images now

(bootloader) Then re-run this command to lock

OKAY [ 0.020s]

finished. total time: 0.020s

D:\Dev\mfastboot>mfastboot flash oem oem.img

target max-sparse-size: 256MB

sending 'oem' (232919 KB)...

OKAY [ 4.946s]

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: 5.016s

D:\Dev\mfastboot>mfastboot flash system system.img_sparsechunk.0

target max-sparse-size: 256MB

Sparse-Flash is enabled!

sending sparse 'system' (262142 KB)...

OKAY [ 5.844s]

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: 5.924s

D:\Dev\mfastboot>mfastboot flash system system.img_sparsechunk.1

target max-sparse-size: 256MB

Sparse-Flash is enabled!

sending sparse 'system' (261720 KB)...

OKAY [ 5.917s]

writing 'system'...

(bootloader) Invalid signed image

(bootloader) Preflash validation failed

FAILED (remote failure)

finished. total time: 5.952s

D:\Dev\mfastboot>mfastboot flash system system.img_sparsechunk.2

target max-sparse-size: 256MB

Sparse-Flash is enabled!

sending sparse 'system' (250755 KB)...

OKAY [ 5.584s]

writing 'system'...

(bootloader) Invalid signed image

(bootloader) Preflash validation failed

FAILED (remote failure)

finished. total time: 5.614s

D:\Dev\mfastboot>mfastboot flash system system.img_sparsechunk.3

target max-sparse-size: 256MB

Sparse-Flash is enabled!

sending sparse 'system' (252175 KB)...

OKAY [ 5.631s]

writing 'system'...

(bootloader) Invalid signed image

(bootloader) Preflash validation failed

FAILED (remote failure)

finished. total time: 5.651s

D:\Dev\mfastboot>mfastboot flash system system.img_sparsechunk.4

target max-sparse-size: 256MB

Sparse-Flash is enabled!

sending sparse 'system' (259627 KB)...

OKAY [ 5.808s]

writing 'system'...

(bootloader) Invalid signed image

(bootloader) Preflash validation failed

FAILED (remote failure)

finished. total time: 5.828s

D:\Dev\mfastboot>mfastboot flash system system.img_sparsechunk.5

target max-sparse-size: 256MB

Sparse-Flash is enabled!

sending sparse 'system' (253704 KB)...

OKAY [ 5.777s]

writing 'system'...

(bootloader) Invalid signed image

(bootloader) Preflash validation failed

FAILED (remote failure)

finished. total time: 5.817s

D:\Dev\mfastboot>mfastboot flash system system.img_sparsechunk.6

target max-sparse-size: 256MB

Sparse-Flash is enabled!

sending sparse 'system' (230784 KB)...

OKAY [ 5.140s]

writing 'system'...

(bootloader) Invalid signed image

(bootloader) Preflash validation failed

FAILED (remote failure)

finished. total time: 5.150s

D:\Dev\mfastboot>mfastboot flash boot boot.img

target max-sparse-size: 256MB

sending 'boot' (16384 KB)...

OKAY [ 0.369s]

writing 'boot'...

(bootloader) Security version downgrade

(bootloader) Image boot failed validation

(bootloader) Preflash validation failed

FAILED (remote failure)

finished. total time: 0.549s

D:\Dev\mfastboot>mfastboot oem lock

...

(bootloader) Still require signed boot.img

OKAY [ 0.010s]

finished. total time: 0.010s

D:\Dev\mfastboot>mfastboot reboot

rebooting...

finished. total time: 0.010s