T-Mobile has released new software update for HTC HD2 smartphone. It’s called HD2 Software Version 2.13.531.1.
Here’s how to upgrade T-Mobile HTC HD2 Software Version 2.13.531.1 :
1.   Download the new software  to your PC.  You will be instructed to enter the 15-digit IMEI number for your device to access the download.
2. Ensure ActiveSync 4.5 for computers [...]