To test your network connection, open TwitterBerry and open the "Configure" screen.  Select "Connection Doctor" from the menu. Choose the service you would like to test: twitter.com, or a media provider such as twitpic or yfrog. Click the "Run" button to start the test.
You will see status bars at the bottom of the screen, testing all the routes to the network.

If the TCP connection is not working, and you have a GPRS-based mobile phone carrier, you can select the "Lookup APN" menu item to search Orangatame's database of TCP settings for your phone carrier. If your country/carrier are missing, please send your network report and we will try to find it for you.