HTC SDA (USA) / SP5m (Tornado)

T-Mobile GPRS setup
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Access Point - wap.voicestream.com, IP=0.0.0.0
outgoing mail: myemail.t-mobile.com
T-Mobile USA

GPRS Connections
Description: T-Zones GPRS
Connects to: The Interent
Access point: wap.voicestream.com
User name:
Password:
Primary DNS: 216.155.165.50
Secondary DNS:
IP address:

Proxy Connections
Description: T-Zones Proxy
Connects from: The Internet
Connects to: WAP Network
Proxy (name:port): 216.155.165.50:8080
Type: HTTP
User name:
Password:

Make sure that no other settings have been entered in each of the respected sections, only have T-Zones GPRS settings in the GPRS Connections section, and T-Zones Proxy in the Proxy Connections section, that's it. Apparently to many settings fouls everything up.

Also pay close attention to the Secondary DNS entry of the GPRS Connections, no it's not a mistake, and I didn't forget to enter in an address, you want to leave it BLANK, just like the User name, Password, and IP address.

Now set all the connections to Automatic. If the Work Connection or the Secure WAP Connection or both say None Available, you OK, don't worry about those two, but Internet and WAP connections should both be set to Automatic.

The last thing you will want to do is configure Internet Explorer on your Smartphone.
Go to: Internet Explorer - Menu - Options - Connections
-Make sure there is NO check mark in the box to Automatically Detect Settings.
-Select Network : WAP Network