I have noticed a lot of Sprint(CDMA) HTC One users are flashing GSM roms and soft bricking their devices lately.
I have personally rescued 50+ devices in the past couple weeks so I'm posting this guide in hopes that it will save some headaches and stress for Sprint users.
These instructions are for the Sprint variant only
You will need to be unlocked and have TWRP or CWM installed for this to work
1. Follow this guide Guide - Get s-off on 1.31 HTC One (Sprint) Update:
You will get a failed warning after issuing the echo blah blah command this is normal and nothing to be worried about and after the echo command type exit to exit the adb shell and continue.
2. Get the RUU HERE click the first link in the thread(extract it to your desktop/open it and click setup it will scan your device,go thru the various screens reading the warnings and checking the boxes, once it starts it will take 10-20 minutes to complete) once it's done you will be back to completely stock.
Device not recognized?
On your PC go to device manager and find your phone(usually M7WLS), right click and select properties
Select the driver tab
Select update driver
Select browse my comp
Let me pick
Look for ADB USB device or similar should be one of the first couple choices
Select MyHTC install and you should be good
Latest HTC Drivers
Use revone to gain s-off (if you go with this option once you are s-off you won't need to use HTC-Dev to unlock your bootloader again because revone does it for you) A sidenote about revone it will fail several times just press the UP arrow on your keyboard to issue the same command and press enter.Watch the cmd window for instructions to reboot and continue.
or flash a Sprint rom from the Sprint forum
Thanks to Indirect for his Guide
Thanks to OMJ for the RUU
Thanks to Revolutionary dev team for Revone
If you need assistance I'll be happy to help.
**NOTE** this guide will be obsolete once Sprint/HTC pushes an OTA and the hboot changes.
Updated 4.3/4.4 Guide found HERE