Pre Req 
If u Want ICS Upgrade than Flash Stock RUU from Bootloader, Before Unlocking Bootloader 
Links for ICS RUU: 
AP Mirror #2 
 
AP Mirror #3 
 
 
After downloading the file, rename it to "PH98IMG.zip" (no quotes) 
 
Place the renamed file onto the root of the SD Card 
 
Power down your device 
 
Reboot into the bootloader by holding VOL DOWN + Power 
 
The flashing process should begin automatically 
 
 
HTC Sync: http://dl4.htc.com/m...up_3.0.5606.exe 
HTC Super Tool: http://forum.xda-dev...d.php?t=1343114 
Enable USB Debug on Rezound 
Use Charge Only mode when connected to PC 
Exit HTC Sync on PC 
GSM Patch: http://dl.dropbox.co...STOCKGSMFIX.zip 
Once u have got the ICS, Use Rezound All in one Tool to Unlock Bootoader, 
Than Load Aaron Recovery from the Same tool 
Reboot into Recovey 
Wipe All Data Factory Reset 
Install GSM patch from Recovery 
Reboot Phone 
Insert Ur GSM SIM Card & Start Using Call, SMS & DATA 
U may need to Dial *#*#4636#*#* to Switch been 3G & Edge 
USSD Code When u Dial code its not working, But Balance is Shown after u make Calls & SMS