"Unroot" your phone (factory flash)

Unroot my phone? Why would I want to do this? Well, there are a number of reasons why someone might want to factory flash their phone:

• Need to send the phone if for repairs covered under warranty. You'll need your phone to be running the factory software and you'll need your phone to be unrooted. Sprint/HTC will reject your phone and void your warranty if you send them a phone that's been hacked up.
• Perhaps you loaded a custom ROM and forgot to make a backup of your phone's current state. Now all of a sudden, your phone is behaving badly, being buggy, etc. A factory reset will be your best (and sometimes only) fix.
• Your phone is totally messed up and really doesn't work at all anymore.

I'm sure someone can think of some other reasons why one would want to factory flash (unroot) a phone. Whatever your reason may be, here's how you'll go about it.

Step 1: Download the RUU: Click here to download

Step 2: Plug your phone into the computer you've downloaded the RUU to (or the network) and set it to "Charge Only"

Step 3: On your computer, navigate to the HTC Sprint Hero MR 2.27.651.5.exe that you downloaded.

Step 4: Run HTC Sprint Hero MR 2.27.651.5.exe (which you downloaded in Step 1) and follow the prompts. This piece of software will walk you through "Upgrading" your phone down to the vulnerable build.

Please Note
1) This software will most likely fail to load the "bootloader" (you'll know what I mean when it happens). Just unplug your phone and plug it back in and run the software again.

2) This software will most likely fail somewhere else along the way. Just unplug your phone and plug it back in and run the software again. It WILL work, it simply requires a few shots at it. Do not worry, you are NOT bricking your phone.

3) Once there is success, your phone will reboot. As it's booting, it will run through the normal start up splash screens (HTC, quietly brilliant, Sprint Now Network, etc.) The phone will appear to hang on "NOW" for quite some time; just leave it alone, it will come around and finish up just fine.

There you have it. You're unrooted and have completed a factory reset.