HTC Incredible :: How To Downgrade To Official 2.2

There have already been several requests for information on how to downgrade back to the official 2.2. The following process will remove root. Whether you need to return a phone or you just want to clean the slate and go back to stock, here is how to get there:

Note: Your SD card MUST be formatted to FAT32 before proceeding. The file will not be recognized otherwise. If you have yet to format, remember that formatting wipes the card. Be sure to copy/move your SD contents to a safe place (PC desktop) and replace after the formatting process. I will not go into the procedure in this thread as it is easily found with a Google search.

1.) Need to return a phone and currently have S-Off? (aka Unrevoked Forever) If so, please visit public:forever [RootWiki] where you can download the latest S-On tool and the process to load to your phone. If you want to keep S-Off and just return to the official 2.2, skip to step 2.

2.) Download the 2.2 PB31IMG.zip (extracted from the official 2.2 RUU)

Mirror 1 (Credit and thanks to Doug Piston for hosting)
Mirror 2

Note the file size (172 MB) and the MD5 (31BB1611A0FA8197D447C0438426717E) to ensure a successful download and file integrity. If you have questions about how to verify MD5, please see post #2 of this thread.

3.) Attach phone to PC with USB debugging on and in disk drive mode.

4.) Access the SD storage and drag the PB31IMG.zip from the desktop onto the root of the SD card (any open area, do not place into a folder).

5.) Swipe down notification bar on phone and change to charge only.

6.) Unplug phone from PC and turn off phone.

7.) Hold volume down while pressing power button to enter hboot.

8.) PB31IMG.zip should be automatically recognized in hboot. Press volume up to continue with update. Do NOT interrupt.

9.) When finished, reboot to stock 2.2 and verify the following information at Menu > Settings > About Phone:

Android Version: 2.2
Baseband Version: 2.15.00.07.28
Software Number: 3.26.605.1

10.) Remove the PB31IMG.zip from the SD card to avoid an inadvertant reload in the future. You are now unrooted and on stock 2.2

Also adding the RUU option for those that are interested. Thanks again to Doug for the upload/host. For those new to RUU, download to a PC and run from there:

http://dougpiston.com/files/RUU/RUU_Incredible_C_Froyo_VERIZON_WWE_3.26.605.1_Radi o_2.15.00.07.28_2k4k_NV_1.70_PRL58006_release_1520 16_signed.exe