[HTC Rezound] reesejeric:
FIXED heres how Copy Internal SD card contents to your computer. The Relocking/RUU process wipes the phones internal memory. I also recommend having a backup copy of your SD card kept on the computer and updated every so often.

Place the Android Police RUU file on your external SD card, and rename to "PH98IMG.zip"

Useful Tip - In Windows 7 click on "Organize" in the windows explorer menu. Then select "Folder and Search Options" When The Folder Option windo appears click on "View" and uncheck "Hide Extensions of Known File types." This will prevent windows from naming a file PH98IMG.zip.zip

Relock the bootloader using Fastboot. On your computer browse the the folder fastboot.exe is in. If it's C"\Android" then you would hold Shift and right click on "Android" and select "Open Command Window Here

Connect your phone to USB, and boot your phone into fastboot by powering off, then powering into hboot holding power + vol down

When hboot comes up on the screen it may show it's "loading" the PH98IMG.zip file. Just wait for it to load and say no to the update. Then select fastboot, and when you enter fastboot, "Fastboot USB" will display on the screen in red

The command prompt should display "C:\Android..." Type fastboot oem lock and hit enter

Your bootloader will show relocked, may give a security warning, and saying "Tampered" is a good thing

Now that it's locked, choose bootloader instead of fastboot. Rebooting the bootloader will allow it to see the PH98IMG.zip (RUU) file again. It may take a minute or two to load, and will then ask if you would like to update. Select yes and press Power to begin

IMPORTANT - This is tricky and where people mess up in the proccess. You have to completely flash this RUU twice for it to write everything correctly. In fact it may even seem like three times because of how it reboots itself along the way.

Once it starts update you can unplug the USB cord. This is a large update, so it will not be instant like a tiny kernel. You're writing 650 MB of updates as opposed to 3 MB in the kernel install you're used to.

It will show you on the screen what it's doing. It will probably power itself on and off a couple of times and come back to bootloader or fastboot. When it does, just reboot bootloader and say yes to update. Now it will be updating steps 1 thru 18 in sequential order. Sometimes it does everything without going back to the fastboot screen and that's ok. Once it does the updates 1 thru 7 or 1 thru 18 it will probably reboot itself and show the white HTC screen. When it's on this white boot animation, pull the battery and boot into bootloader again (power + vol down) and select yes to run the PH98IMG.zip. This second time on the full update, it may appear to be doing step 7 repeatedly, it's supposed to do that just let it keep doing it's thing. When the update is complete, it will say that it successfully completed and press power to reboot. Asking you to press power to reboot after the second full flash is how you know that it's finished with the complete update.

It will be a long first boot, but will boot itself into the new stock ICS rom from the RUU

Installation process - Part 2

You should now be booted into the stock RUU rom and sitting at a setup screen. You need to go through this setup screen but do not need to sign into anything. Just press next and skip to get through it to the homescreens.

Place the phone in disc drive mode so that you can access the external SD card.

Remove the PH98IMG.zip from your external SD card. You can delete it if you already have a copy on your PC or have no reason to save it. Just so long as it's off the SD card.

Now power the phone down and then boot back into hboot with power_vol down just like before, put it in Fastboot -USB mode once again plugged into the computer

Now you will use the HTCdev unlock key that you gathered at the beginning. It may already be in the correct folder or you may need to copy it Needs to be in the same folder as the fastboot.exe application, either C:\Android or C:\Android-SDK\Platform Tools

Your command prompt window should still be open from when you relocked the bootloader. This time type the command fastboot flash unlocktoken Unlock_code.bin and press enter

Your bootloader should unlock, you have to say yes to unlock on the phone itself and upon being confirmed, the phone will reboot

Allow the phone to reboot itself, and then turn the phone off and power back into hboot/Fastboot - USB again

The amon RA recovery img was downloaded at the very start with the other files. Rename this file to recovery.img and place it in the same folder as the fastboot.exe application in Android SDK (Hint - Same place you dropped the Unlock_code.bin

In your command window type fastboot flash recovery recovery.img and press enter

then fastboot reboot you now have recovery put rom of choice on sd flash that and what ever else developer for rom has you to.hope it works for you and last but not least CRIDET to theandroidsoul.com this is where i found the text and it was Posted on March 4, 2012 in Hacks, HTC by Kapil also THANKS to ericsignals for pointind in right direction.