Done playing around with your HTC Rezound from Verizon? Ready to unroot it and get it back to stock so you can return it for warranty or maybe just to get it back to out of box state? No problem. Here’s how.
I Before You Begin
1. THIS SHOULD ONLY BE USED ON DEVICES THAT ARE S-ON, NOT S-OFF OTHERWISE YOU WILL BRICK YOUR DEVICE!
To check take out the battery, wait 5 seconds, then put it back in. After that, turn it back on by holding down Volume Down and Power at the same time. Let go when you see the white screen come up. Then look at the top of that screen for “Vigor PVT SHIP S-ON RL”. If it says S-ON in there, you can continue. If it says S-OFF, then do NOT continue.
II. Relock the Bootloader
1. Download the fastboot tool from Slacker101 and save it to desktop of your computer.
2. Plug in the phone via USB cable to your computer.
3. Go to Settings > Developer Options > Make sure USB Debugging is checked ON.
4. Open the folder called tools and hold shift on your keyboard and right click in a blank area in the folder. Then select Open Command Prompt Here.
5. When the command prompt opens, type the following with hitting enter at the end of each line:
adb reboot fastboot
fastboot oem lock
III. Flash Original ROM
1. Download the latest original ROM from here:
2. Right click the .exe for the RUU and select Run as Administrator. Follow the on-screen prompts to flash the original ROM.