Excuse my ignorance but I need to make some calls all over the country (USA) and was wondering if there are extra charges for calling other states? I have At&T and reside in California.
It really depends on your plan. While pretty much all today's plans don't have long distance charges, there might be some that do (perhaps some special loyalty/saver type of plans), not to mention that that there are certainly at least some older plans that might charge for long distance, and various people might be on those still.