How TO HTC Touch Unlocking????

Steps:

1. Copy “Cert_SPCS.cab” on your phone & install (run). Download:  
Link-1, Link-2, Link-3
 
2. Copy “EnableRapi.cab” on your phone & install (run). Download:
Link-1, Link-2, Link-3

How to unlock htc sensation bootloader

After unlock bootloader you are able to install custom Os on your device

Note
Boot loader will delete all of your personal data from your device like text messages And application ect
First go to HTCDev.com And register

Step 1
Turn off you device and wait for complete shut down then Remove and reinsert the battery

 Step 2
Press Volume Down and Power to start the device into Bootloader mode