I have a pantech matrix, sony erricson, and a moto razr. I recently had an lg neon. Stupid me broke the neon. I went to put my sim card in the matrix, and it said invalid sim. My erricson(which was a gophone phone) said to insert sim. And the razr also said to insert sim. Why won't my att phones read my sim card? This is frustrating. I do not want to have to buy a whole new phone when I have three that I could be using.
Either your SIM is damaged or is not provisioned correctly. You can obtain a replacement SIM at any AT&T store. To make sure your SIM is provisioned correctly, call AT&T Customer Care at 1-800-331-0500.
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