Wireless Joint

Gypsy wireless activated using new att prepaid card. I get all signal bars on mr 1100, but only have letter “H” for the network. I tried multiple resets and when I try to browse it takes me to the att activation page to enter sim and imei. Do I need a different SIM card?Any advice would be much appreciated.

All bars is a clue your SIM is not activated

Not activated. Sometimes H refers to HSPA (a 3G technology), but if it's showing as the network name, that's different.