[One (M7) Q&A, Help & Troubleshooting] ckpv5:
I redo the process. Hopefully this will be helpful to you and others with hboot 1.56

ROM : Stock 4.20.707.6

PC : Win 8.1 with USB dirty hack (not needed for M7 but I did it because of other devices that I own need the hack for a proper working fastboot) - http://xdaforums.com/showthread.php?p=49131915

ADB : version 1.0.31 - http://xdaforums.com/showpost.php?p=50490405&postcount=150

Before the S-Off process

Hboot 1.56 - S-On - Locked

The process

1. unlock bootloader with unlock_code.bin from htcdev.com

2. enable usb debugging and accept the RSA key

3. reboot to bootloader and fastboot flash insecure boot.img (I flashed the TeamSeven kernel - http://xdaforums.com/showthread.php?t=2307371)

4. install the TWRP recovery - openrecovery-twrp-2.6.3.3-m7.img

5. install SuperSu in recovery - UPDATE-SuperSU-v1.93.zip

- enable SuperSU

- Default access - Grant

- select Enable su during boot

- select Trust system user

6. Disable firewall and anti-virus on PC

7. Run Firewater S-Off process

note : I use the Firewater file for method 2 but follow the method 1 for S-Off process (meaning - download the Firewater file from the link for method 2, not method 1)

Microsoft Windows [Version 6.3.9600]
(c) 2013 Microsoft Corporation. All rights reserved.

C:\Users\ckpv5\Desktop>adb reboot

C:\Users\ckpv5\Desktop>adb wait-for-device push firewater /data/local/tmp
4123 KB/s (4347896 bytes in 1.029s)

C:\Users\ckpv5\Desktop>adb shell
root@m7:/ # chmod 755 /data/local/tmp/firewater
chmod 755 /data/local/tmp/firewater
root@m7:/ # /data/local/tmp/firewater
/data/local/tmp/firewater

==================== firewater S-OFF 0.4.0 ==============================

firewater S-OFF comes with NO WARRANTY (express or implied)
and NO GUARANTEE OF FITNESS for any particular task.
We have made every effort we can to make this a safe process for users
however the authors disclaim any liability for damage to your phone
or other materials or devices used during this process.

The entire risk of running firewater S-OFF lies with you, the user.
By using this software you acknowledge and accept that the authors
are not liable for any loss, material or otherwise howsoever caused.

firewater S-OFF may not be rehosted, repackaged, one-clicked, etc.
support is available @ #firewater on the freenode and andirc networks
support is much faster there vs.posting helpme threads on xda etc

Do not operate a motor vehicle after interacting with firewater
Do not inhale firewater or allow firewater to come in contact with eyes
firewater is best served at extremely cold temperatures
firewater has been known to cause temporary lapses in judgement
DO NOT TAUNT FIREWATER, YOU'VE BEEN WARNED

=========================================================================

Do you understand the implications of these warnings?

(Yes/No)
Yes
Yes
Yes
Yes

!!If firewater hangs for more than 2 minutes or device enters qhusb mode, ho

!!If firewater hangs for more than 2 minutes or device enters qhusb mode, ho

!!If firewater hangs for more than 2 minutes or device enters qhusb mode, ho
ld power for 60 seconds !!
=========================================================================
preparing, one moment

The first bottle is open
chugging..........
that firewater was good and hot, throwing out the empties

=========================================================================
==== device is now s-off. Don't forget to send us all your money =====
=========================================================================
=============== paypal: firewaterdevs@gmail.com =======================
=========================================================================

root@m7:/ # Yes
/system/bin/sh: Yes: not found
127|root@m7:/ # exit
exit

C:\Users\ckpv5\Desktop>adb reboot bootloader

C:\Users\ckpv5\Desktop>

8. Profit

After S-Off process

Hboot 1.56 - S-Off - unlocked