From my BlackBerryModem FAQ:
Q: I use Cingular. It doesn't work!
A: It works now, but it is a little tricky to set up at first. You have to telephone Cingular and ask for these line items to be added to your Cingular bill, if it does not already show up on your Cingular bill, called "Wireless Internet Express" and "Wireless Internet Express Data Connect":Quote:
WIX EXTENDED INTERNET $0.00
WIX DATA CONNECT $0.00
WRLSS INTRNT XPRS PAY PER USE $0.00
Next, you need to use the proper APN username and APN password as follows, in all uppercase, when you start the "BlackBerry Modem" connection when using Cingular:Quote:
It is very important to make sure that all the WIX lineitems are already on your bill, including "Wireless Internet Express DATA CONNECT". This is required for tethered modem operation with Cingular. Once this is done, then there is no more port blocking anymore!
You also need BlackBerryOS 3.8 or 4.0 or later.