[One (M8) Q&A, Help & Troubleshooting] alexreznik1984:
i did it twice and still os 3.28.401.6 evrything was ok

C:\adb>fastboot flash zip firmware.zip

target reported max download size of 1826418688 bytes

sending 'zip' (30215 KB)...

OKAY [ 2.394s]

writing 'zip'...

(bootloader) zip header checking...

(bootloader) zip info parsing...

(bootloader) checking model ID...

(bootloader) checking custom ID...

(bootloader) start image[hboot] unzipping for pre-update check...

(bootloader) total_image_number=13

(bootloader) start image[hboot] unzipping & flushing...

(bootloader) [RUU]UZ,hboot,0

(bootloader) [RUU]UZ,hboot,52

(bootloader) [RUU]UZ,hboot,100

(bootloader) [RUU]WP,hboot,0

(bootloader) [RUU]WP,hboot,99

(bootloader) [RUU]WP,hboot,100

(bootloader) ...... Successful

(bootloader) current_image_number=0

(bootloader) start image[rpm] unzipping & flushing...

(bootloader) [RUU]UZ,rpm,0

(bootloader) [RUU]UZ,rpm,100

(bootloader) [RUU]WP,rpm,0

(bootloader) [RUU]WP,rpm,100

(bootloader) ...... Successful

(bootloader) current_image_number=1

(bootloader) start image[sbl1-1] unzipping & flushing...

(bootloader) [RUU]UZ,sbl1-1,0

(bootloader) [RUU]UZ,sbl1-1,100

(bootloader) signature checking...

(bootloader) verified fail

(bootloader) ..... Bypassed

(bootloader) current_image_number=2

(bootloader) start image[sbl1-2] unzipping & flushing...

(bootloader) [RUU]UZ,sbl1-2,0

(bootloader) [RUU]UZ,sbl1-2,100

(bootloader) signature checking...

(bootloader) [RUU]WP,sbl1-2,0

(bootloader) [RUU]WP,sbl1-2,100

(bootloader) ...... Successful

(bootloader) current_image_number=3

(bootloader) start image[sbl1-3] unzipping & flushing...

(bootloader) [RUU]UZ,sbl1-3,0

(bootloader) [RUU]UZ,sbl1-3,100

(bootloader) signature checking...

(bootloader) verified fail

(bootloader) ..... Bypassed

(bootloader) current_image_number=4

(bootloader) start image[sbl1-4] unzipping & flushing...

(bootloader) [RUU]UZ,sbl1-4,0

(bootloader) [RUU]UZ,sbl1-4,100

(bootloader) signature checking...

(bootloader) verified fail

(bootloader) ..... Bypassed

(bootloader) current_image_number=5

(bootloader) start image[sensor_hub] unzipping & flushing...

(bootloader) [RUU]UZ,sensor_hub,0

(bootloader) [RUU]UZ,sensor_hub,100

(bootloader) ...... Successful

(bootloader) current_image_number=6

(bootloader) start image[tz] unzipping & flushing...

(bootloader) [RUU]UZ,tz,0

(bootloader) [RUU]UZ,tz,100

(bootloader) [RUU]WP,tz,0

(bootloader) [RUU]WP,tz,100

(bootloader) ...... Successful

(bootloader) current_image_number=7

(bootloader) start image[wcnss] unzipping & flushing...

(bootloader) [RUU]UZ,wcnss,0

(bootloader) [RUU]UZ,wcnss,20

(bootloader) [RUU]UZ,wcnss,40

(bootloader) [RUU]UZ,wcnss,63

(bootloader) [RUU]UZ,wcnss,86

(bootloader) [RUU]UZ,wcnss,100

(bootloader) [RUU]WP,wcnss,0

(bootloader) [RUU]WP,wcnss,100

(bootloader) ...... Successful

(bootloader) current_image_number=8

(bootloader) start image[adsp] unzipping & flushing...

(bootloader) [RUU]UZ,adsp,0

(bootloader) [RUU]UZ,adsp,11

(bootloader) [RUU]UZ,adsp,22

(bootloader) [RUU]UZ,adsp,32

(bootloader) [RUU]UZ,adsp,44

(bootloader) [RUU]UZ,adsp,55

(bootloader) [RUU]UZ,adsp,66

(bootloader) [RUU]UZ,adsp,76

(bootloader) [RUU]UZ,adsp,87

(bootloader) [RUU]UZ,adsp,98

(bootloader) [RUU]UZ,adsp,100

(bootloader) [RUU]WP,adsp,0

(bootloader) [RUU]WP,adsp,100

(bootloader) ...... Successful

(bootloader) current_image_number=9

(bootloader) start image[radio] unzipping & flushing...

(bootloader) [RUU]UZ,radio,0

(bootloader) [RUU]UZ,radio,9

(bootloader) [RUU]UZ,radio,18

(bootloader) [RUU]UZ,radio,23

(bootloader) [RUU]UZ,radio,31

(bootloader) [RUU]UZ,radio,36

(bootloader) [RUU]UZ,radio,45

(bootloader) [RUU]UZ,radio,54

(bootloader) [RUU]UZ,radio,63

(bootloader) [RUU]UZ,radio,72

(bootloader) [RUU]UZ,radio,81

(bootloader) [RUU]UZ,radio,86

(bootloader) [RUU]UZ,radio,95

(bootloader) [RUU]UZ,radio,100

(bootloader) trying to rename MBA

(bootloader) [RUU]WP,radio,0

(bootloader) [RUU]WP,radio,36

(bootloader) [RUU]WP,radio,72

(bootloader) [RUU]WP,radio,100

(bootloader) ...... Successful

(bootloader) current_image_number=10

(bootloader) start image[rcdata] unzipping & flushing...

(bootloader) [RUU]UZ,rcdata,0

(bootloader) [RUU]UZ,rcdata,100

(bootloader) [RUU]WP,rcdata,0

(bootloader) [RUU]WP,rcdata,100

(bootloader) ...... Successful

(bootloader) current_image_number=11

(bootloader) start image[emmc_fw16] unzipping & flushing...

(bootloader) ...... Successful

(bootloader) current_image_number=12

OKAY [ 14.527s]

finished. total time: 16.926s

C:\adb>fastboot flash zip firmware.zip

target reported max download size of 1794916352 bytes

sending 'zip' (30215 KB)...

OKAY [ 2.381s]

writing 'zip'...

(bootloader) zip header checking...

(bootloader) zip info parsing...

(bootloader) checking model ID...

(bootloader) checking custom ID...

(bootloader) start image[hboot] unzipping for pre-update check...

(bootloader) total_image_number=13

(bootloader) start image[hboot] unzipping & flushing...

(bootloader) [RUU]UZ,hboot,0

(bootloader) [RUU]UZ,hboot,52

(bootloader) [RUU]UZ,hboot,100

(bootloader) [RUU]WP,hboot,0

(bootloader) [RUU]WP,hboot,99

(bootloader) [RUU]WP,hboot,100

(bootloader) ...... Successful

(bootloader) current_image_number=0

(bootloader) start image[rpm] unzipping & flushing...

(bootloader) [RUU]UZ,rpm,0

(bootloader) [RUU]UZ,rpm,100

(bootloader) [RUU]WP,rpm,0

(bootloader) [RUU]WP,rpm,100

(bootloader) ...... Successful

(bootloader) current_image_number=1

(bootloader) start image[sbl1-1] unzipping & flushing...

(bootloader) [RUU]UZ,sbl1-1,0

(bootloader) [RUU]UZ,sbl1-1,100

(bootloader) signature checking...

(bootloader) verified fail

(bootloader) ..... Bypassed

(bootloader) current_image_number=2

(bootloader) start image[sbl1-2] unzipping & flushing...

(bootloader) [RUU]UZ,sbl1-2,0

(bootloader) [RUU]UZ,sbl1-2,100

(bootloader) signature checking...

(bootloader) [RUU]WP,sbl1-2,0

(bootloader) [RUU]WP,sbl1-2,100

(bootloader) ...... Successful

(bootloader) current_image_number=3

(bootloader) start image[sbl1-3] unzipping & flushing...

(bootloader) [RUU]UZ,sbl1-3,0

(bootloader) [RUU]UZ,sbl1-3,100

(bootloader) signature checking...

(bootloader) verified fail

(bootloader) ..... Bypassed

(bootloader) current_image_number=4

(bootloader) start image[sbl1-4] unzipping & flushing...

(bootloader) [RUU]UZ,sbl1-4,0

(bootloader) [RUU]UZ,sbl1-4,100

(bootloader) signature checking...

(bootloader) verified fail

(bootloader) ..... Bypassed

(bootloader) current_image_number=5

(bootloader) start image[sensor_hub] unzipping & flushing...

(bootloader) [RUU]UZ,sensor_hub,0

(bootloader) [RUU]UZ,sensor_hub,100

(bootloader) ...... Successful

(bootloader) current_image_number=6

(bootloader) start image[tz] unzipping & flushing...

(bootloader) [RUU]UZ,tz,0

(bootloader) [RUU]UZ,tz,100

(bootloader) [RUU]WP,tz,0

(bootloader) [RUU]WP,tz,100

(bootloader) ...... Successful

(bootloader) current_image_number=7

(bootloader) start image[wcnss] unzipping & flushing...

(bootloader) [RUU]UZ,wcnss,0

(bootloader) [RUU]UZ,wcnss,20

(bootloader) [RUU]UZ,wcnss,40

(bootloader) [RUU]UZ,wcnss,63

(bootloader) [RUU]UZ,wcnss,86

(bootloader) [RUU]UZ,wcnss,100

(bootloader) [RUU]WP,wcnss,0

(bootloader) [RUU]WP,wcnss,100

(bootloader) ...... Successful

(bootloader) current_image_number=8

(bootloader) start image[adsp] unzipping & flushing...

(bootloader) [RUU]UZ,adsp,0

(bootloader) [RUU]UZ,adsp,11

(bootloader) [RUU]UZ,adsp,22

(bootloader) [RUU]UZ,adsp,32

(bootloader) [RUU]UZ,adsp,44

(bootloader) [RUU]UZ,adsp,55

(bootloader) [RUU]UZ,adsp,66

(bootloader) [RUU]UZ,adsp,76

(bootloader) [RUU]UZ,adsp,87

(bootloader) [RUU]UZ,adsp,98

(bootloader) [RUU]UZ,adsp,100

(bootloader) [RUU]WP,adsp,0

(bootloader) [RUU]WP,adsp,100

(bootloader) ...... Successful

(bootloader) current_image_number=9

(bootloader) start image[radio] unzipping & flushing...

(bootloader) [RUU]UZ,radio,0

(bootloader) [RUU]UZ,radio,9

(bootloader) [RUU]UZ,radio,18

(bootloader) [RUU]UZ,radio,23

(bootloader) [RUU]UZ,radio,31

(bootloader) [RUU]UZ,radio,36

(bootloader) [RUU]UZ,radio,45

(bootloader) [RUU]UZ,radio,54

(bootloader) [RUU]UZ,radio,63

(bootloader) [RUU]UZ,radio,72

(bootloader) [RUU]UZ,radio,81

(bootloader) [RUU]UZ,radio,86

(bootloader) [RUU]UZ,radio,95

(bootloader) [RUU]UZ,radio,100

(bootloader) trying to rename MBA

(bootloader) [RUU]WP,radio,0

(bootloader) [RUU]WP,radio,36

(bootloader) [RUU]WP,radio,72

(bootloader) [RUU]WP,radio,100

(bootloader) ...... Successful

(bootloader) current_image_number=10

(bootloader) start image[rcdata] unzipping & flushing...

(bootloader) [RUU]UZ,rcdata,0

(bootloader) [RUU]UZ,rcdata,100

(bootloader) [RUU]WP,rcdata,0

(bootloader) [RUU]WP,rcdata,100

(bootloader) ...... Successful

(bootloader) current_image_number=11

(bootloader) start image[emmc_fw16] unzipping & flushing...

(bootloader) ...... Successful

(bootloader) current_image_number=12

OKAY [ 15.203s]

finished. total time: 17.591s

C:\adb>fastboot reboot-bootloader

rebooting into bootloader...

OKAY [ 0.017s]

finished. total time: 0.019s

C:\adb>fastboot reboot

rebooting...

finished. total time: 0.014s

C:\adb>