[One (M7) Q&A, Help & Troubleshooting] dogmatism:
here goes [MENTION=2605798]nkk71[/MENTION] :

C:\ADB and Fastboot - minimal>fastboot oem rebootRUU
...
(bootloader) Start Verify: 3
OKAY [ 0.040s]
finished. total time: 0.040s

C:\ADB and Fastboot - minimal>fastboot flash zip 3.06.1700.10.zip
target reported max download size of 1526722560 bytes
sending 'zip' (41566 KB)...
OKAY [ 2.950s]
writing 'zip'...
(bootloader) adopting the signature contained in this image...
(bootloader) signature checking...
(bootloader) zip header checking...
(bootloader) zip info parsing...
(bootloader) checking model ID...
(bootloader) checking custom ID...
(bootloader) checking main version...
(bootloader) checking hboot version...
(bootloader) start image[hboot] unzipping for pre-update check...
(bootloader) start image[hboot] flushing...
(bootloader) signature checking...
(bootloader) [RUU]WP,hboot,0
(bootloader) [RUU]WP,hboot,99
(bootloader) [RUU]WP,hboot,100
(bootloader) ...... Successful
FAILED (remote: 90 hboot pre-update! please flush image again immediately)
finished. total time: 10.050s

C:\ADB and Fastboot - minimal>fastboot flash zip 3.06.1700.10.zip
target reported max download size of 1526722560 bytes
sending 'zip' (41566 KB)...
OKAY [ 2.940s]
writing 'zip'...
(bootloader) adopting the signature contained in this image...
(bootloader) signature checking...
(bootloader) zip header checking...
(bootloader) zip info parsing...
(bootloader) checking model ID...
(bootloader) checking custom ID...
(bootloader) checking main version...
(bootloader) checking hboot version...
(bootloader) start image[adsp] unzipping & flushing...
(bootloader) [RUU]UZ,adsp,0
(bootloader) [RUU]UZ,adsp,16
(bootloader) [RUU]UZ,adsp,26
(bootloader) [RUU]UZ,adsp,37
(bootloader) [RUU]UZ,adsp,49
(bootloader) [RUU]UZ,adsp,60
(bootloader) [RUU]UZ,adsp,71
(bootloader) [RUU]UZ,adsp,82
(bootloader) [RUU]UZ,adsp,94
(bootloader) [RUU]UZ,adsp,100
(bootloader) [RUU]WP,adsp,0
(bootloader) [RUU]WP,adsp,100
(bootloader) ...... Successful
(bootloader) start image[boot] unzipping & flushing...
(bootloader) [RUU]UZ,boot,0
(bootloader) [RUU]UZ,boot,14
(bootloader) [RUU]UZ,boot,26
(bootloader) [RUU]UZ,boot,40
(bootloader) [RUU]UZ,boot,54
(bootloader) [RUU]UZ,boot,66
(bootloader) [RUU]UZ,boot,86
(bootloader) [RUU]UZ,boot,98
(bootloader) [RUU]UZ,boot,100
(bootloader) [RUU]WP,boot,0
(bootloader) [RUU]WP,boot,99
(bootloader) [RUU]WP,boot,100
(bootloader) ...... Successful
(bootloader) start image[pg2fs_spcustom] unzipping & flushing...
(bootloader) [RUU]UZ,pg2fs_spcustom,0
(bootloader) [RUU]UZ,pg2fs_spcustom,47
(bootloader) [RUU]UZ,pg2fs_spcustom,99
(bootloader) [RUU]UZ,pg2fs_spcustom,100
(bootloader) ...... Successful
(bootloader) start image[recovery] unzipping & flushing...
(bootloader) [RUU]UZ,recovery,0
(bootloader) [RUU]UZ,recovery,11
(bootloader) [RUU]UZ,recovery,23
(bootloader) [RUU]UZ,recovery,33
(bootloader) [RUU]UZ,recovery,44
(bootloader) [RUU]UZ,recovery,57
(bootloader) [RUU]UZ,recovery,67
(bootloader) [RUU]UZ,recovery,80
(bootloader) [RUU]UZ,recovery,90
(bootloader) [RUU]UZ,recovery,100
(bootloader) [RUU]WP,recovery,0
(bootloader) [RUU]WP,recovery,99
(bootloader) [RUU]WP,recovery,100
(bootloader) ...... Successful
(bootloader) start image[rpm] unzipping & flushing...
(bootloader) [RUU]UZ,rpm,0
(bootloader) [RUU]UZ,rpm,100
(bootloader) signature checking...
(bootloader) ...... Successful
(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) start image[sbl1-2] unzipping & flushing...
(bootloader) [RUU]UZ,sbl1-2,0
(bootloader) [RUU]UZ,sbl1-2,100
(bootloader) signature checking...
(bootloader) verified fail
(bootloader) ..... Bypassed
(bootloader) start image[sbl1-3] unzipping & flushing...
(bootloader) [RUU]UZ,sbl1-3,0
(bootloader) [RUU]UZ,sbl1-3,100
(bootloader) signature checking...
(bootloader) ...... Successful
(bootloader) start image[sbl2] unzipping & flushing...
(bootloader) [RUU]UZ,sbl2,0
(bootloader) [RUU]UZ,sbl2,100
(bootloader) signature checking...
(bootloader) ...... Successful
(bootloader) start image[sbl3] unzipping & flushing...
(bootloader) [RUU]UZ,sbl3,0
(bootloader) [RUU]UZ,sbl3,100
(bootloader) signature checking...
(bootloader) ...... Successful
(bootloader) start image[tz] unzipping & flushing...
(bootloader) [RUU]UZ,tz,0
(bootloader) [RUU]UZ,tz,100
(bootloader) signature checking...
(bootloader) ...... Successful
(bootloader) start image[radio] unzipping & flushing...
(bootloader) [RUU]UZ,radio,0
(bootloader) [RUU]UZ,radio,6
(bootloader) [RUU]UZ,radio,12
(bootloader) [RUU]UZ,radio,18
(bootloader) [RUU]UZ,radio,24
(bootloader) [RUU]UZ,radio,31
(bootloader) [RUU]UZ,radio,37
(bootloader) [RUU]UZ,radio,43
(bootloader) [RUU]UZ,radio,49
(bootloader) [RUU]UZ,radio,55
(bootloader) [RUU]UZ,radio,62
(bootloader) [RUU]UZ,radio,68
(bootloader) [RUU]UZ,radio,74
(bootloader) [RUU]UZ,radio,81
(bootloader) [RUU]UZ,radio,87
(bootloader) [RUU]UZ,radio,93
(bootloader) [RUU]UZ,radio,99
(bootloader) [RUU]UZ,radio,100
(bootloader) [RUU]WP,radio,0
(bootloader) [RUU]WP,radio,24
(bootloader) [RUU]WP,radio,49
(bootloader) [RUU]WP,radio,74
(bootloader) [RUU]WP,radio,99
(bootloader) [RUU]WP,radio,100
(bootloader) ...... Successful
OKAY [ 27.560s]
finished. total time: 30.500s

C:\ADB and Fastboot - minimal>fastboot reboot-bootloader
rebooting into bootloader...
OKAY [ 0.040s]
finished. total time: 0.040s

C:\ADB and Fastboot - minimal>fastboot getvar all
(bootloader) version: 0.5
(bootloader) version-bootloader: 1.54.0000
(bootloader) version-baseband: 4A.18.3263.15
(bootloader) version-cpld: None
(bootloader) version-microp: None
(bootloader) version-main: 3.06.1700.10
(bootloader) version-misc: PVT SHIP S-ON
(bootloader) serialno: HT3xxxxxxxxxxx
(bootloader) imei: 35xxxxxxxxxxxxx
(bootloader) meid: 00000000000000
(bootloader) product: m7_ul
(bootloader) platform: HBOOT-8064
(bootloader) modelid: PN0712000
(bootloader) cidnum: GOOGL001
(bootloader) battery-status: good
(bootloader) battery-voltage: 3893mV
(bootloader) partition-layout: Generic
(bootloader) security: on
(bootloader) build-mode: SHIP
(bootloader) boot-mode: FASTBOOT
(bootloader) commitno-bootloader: dirty-94cf81a8fd
(bootloader) hbootpreupdate: 11
(bootloader) gencheckpt: 0
all: Done!
finished. total time: 0.050s

C:\ADB and Fastboot - minimal>