Verify the Access Point Name (APN) and Internet data connection:
HTC HD2 / HTC Touch Pro2  (Related error: "Cannot connect to
proxy server." may require removing and re-adding apn
information.)   Checking the Access Point Name (APN) is useful
when you cannot access the internet or have no data connection.
You may start with No Internet / data: Windows Mobile 6. To
verify that the APN on the device is correct and to verify that
the Internet data connection is turned on, follow these steps:
Important: Do not change the APN on the device. Using any APN
other than the one below will cause issues.     1. From the Home
screen, tap Start.   2. Tap Settings.   3. Tap Menu.    4. Tap
All Settings.   5. Tap Connections.   6. Tao Connections again.
7. Under T-Mobile Data, tap Manage existing connections.
Note: If T-Mobile Data doesn't appear, tap the Advanced tab and
tap Select Network.  In the first drop-down menu, tap T-Mobile
Data, then tap OK.    8. Verify that there is a connection for
T-Mobile Data with t