[One (M9) Android Development] nkk71:
use fastboot oem rebootRUU then the phone won't reboot to system, just back to RUU mode

here's an old log of mine:

C:\ADB_M9_1.0.32>[B][COLOR="Blue"]adb reboot download[/COLOR][/B]
adb server is out of date. killing...
* daemon started successfully *

C:\ADB_M9_1.0.32>[B][COLOR="Blue"]fastboot getvar all[/COLOR][/B]
< waiting for device >
(bootloader) kernel: lk
(bootloader) product: htc_himaulatt
(bootloader) version: 1.0
(bootloader) imei: 35.....
[B][COLOR="Green"](bootloader) version-main: 2.6.502.16[/COLOR][/B]
(bootloader) boot-mode: download
(bootloader) version-baseband: 01.01_U11440601_72.02.50602A_F
(bootloader) version-bootloader: 1.0.0.0000
(bootloader) mid: 0PJA10000
(bootloader) cid: HTC__001
all:
finished. total time: 0.142s

C:\ADB_M9_1.0.32>[B][COLOR="Blue"]fastboot oem rebootRUU[/COLOR][/B]
...
OKAY [ 0.060s]
finished. total time: 0.060s

C:\ADB_M9_1.0.32>[B][COLOR="Blue"]fastboot flash zip M9_2.10.401.1_NoWipe_TWRP_2871b1_rename_to_ROM.zip[/COLOR][/B]
target reported max download size of 800000000 bytes
sending 'zip' (64024 KB)...
OKAY [ 5.115s]
writing 'zip'...
(bootloader) HOSD CL#556209
(bootloader) GPT is up-to-dated. [17408]
(bootloader) Perform pre-update
(bootloader) start@20
(bootloader) aboot_signed.img@100%
(bootloader) adsp.img@BYPASS
(bootloader) cota.img@BYPASS
(bootloader) cpe.img@BYPASS
(bootloader) hosd_signed.img@100%
(bootloader) hyp-8994-1.img@100%
(bootloader) modem_st1.img@BYPASS
(bootloader) modem_st2.img@BYPASS
(bootloader) pg2fs_ship_signkey.img@BYPASS
(bootloader) pmic-8994-1.img@100%
(bootloader) rcdata.img@BYPASS
(bootloader) recovery.img@BYPASS
(bootloader) rpm-8994-1.img@100%
(bootloader) sbl1-8994-1.img@100%
(bootloader) sdi.img@100%
(bootloader) sensor_hub.img@BYPASS
(bootloader) tp_MXM11876.img@BYPASS
(bootloader) tp_SYN3351.img@BYPASS
(bootloader) tz-8994-1.img@100%
(bootloader) radio.img@BYPASS
[COLOR="Red"]FAILED (remote: 90 hboot pre-update! please flush image again immediately)[/COLOR]
finished. total time: 7.196s

C:\ADB_M9_1.0.32>[B][COLOR="Blue"]fastboot flash zip M9_2.10.401.1_NoWipe_TWRP_2871b1_rename_to_ROM.zip[/COLOR][/B]
target reported max download size of 800000000 bytes
sending 'zip' (64024 KB)...
OKAY [ 4.920s]
writing 'zip'...
(bootloader) HOSD CL#576582
(bootloader) GPT is up-to-dated. [17408]
(bootloader) start@20
(bootloader) aboot_signed.img@100%
(bootloader) adsp.img@100%
(bootloader) cota.img@100%
(bootloader) cpe.img@100%
(bootloader) hosd_signed.img@100%
(bootloader) hyp-8994-1.img@100%
(bootloader) modem_st1.img@100%
(bootloader) modem_st2.img@100%
(bootloader) pg2fs_ship_signkey.img@100%
(bootloader) pmic-8994-1.img@100%
(bootloader) rcdata.img@100%
(bootloader) recovery.img@100%
(bootloader) rpm-8994-1.img@100%
(bootloader) sbl1-8994-1.img@100%
(bootloader) sdi.img@100%
(bootloader) tz-8994-1.img@100%
(bootloader) radio.img@100%
(bootloader) sensor_hub.img@BYPASS
(bootloader) tp_MXM11876.img@BYPASS
(bootloader) tp_SYN3351.img@BYPASS
(bootloader) Update zip file OK
(bootloader) end@Done
OKAY [ 9.438s]
finished. total time: 14.358s

C:\ADB_M9_1.0.32>[B][COLOR="Blue"]fastboot reboot-bootloader[/COLOR][/B]
rebooting into bootloader...
OKAY [ 0.010s]
finished. total time: 0.010s

C:\ADB_M9_1.0.32>[B][COLOR="Blue"]fastboot oem reboot-download[/COLOR][/B]
...
OKAY [ 0.010s]
finished. total time: 0.010s

C:\ADB_M9_1.0.32>[B][COLOR="Blue"]fastboot getvar all[/COLOR][/B]
(bootloader) kernel: lk
(bootloader) product: htc_himauhl
(bootloader) version: 1.0
(bootloader) imei: 35.....
[B][COLOR="Green"](bootloader) version-main: 2.10.401.1[/COLOR][/B]
(bootloader) boot-mode: download
(bootloader) version-baseband: 01.04_U11440601_71.02.50709G_F
(bootloader) version-bootloader: 1.0.0.0000
(bootloader) mid: 0PJA10000
(bootloader) cid: HTC__001
all:
finished. total time: 0.060s

C:\ADB_M9_1.0.32>[B][COLOR="Blue"]fastboot reboot[/COLOR][/B]
rebooting...

finished. total time: 0.010s

C:\ADB_M9_1.0.32>