My husband and I have been with AT&T since 2004 and have been very happy with the coverage and customer service we have gotten in the past in the Pee Dee Region of SC. However, both our sons have moved to Charlotte, NC and I phones worked at neither of their homes. We can go 3 blocks away from either area and the phones work great. Any suggestions as to what carrier we should switch to since it is important that we be able to use our phones at the Charlotte homes. I looked at Alltel and was amazed and the roaming and long distance charges for being in Charlotte. Was I reading the chart correctly. We had no roaming or long distance calling charges with AT&T. HELP!