I went to Verizon wireless today because my phone's 4G was acting spotty at best, giving me different cities for my Weather and location services. The guy behind the counter suggested that it may be an issue with the SIM card. He went into the back room and a tech told him that another issue was that early production Thunderbolts had transposed IMEI numbers entered in the hardware that didn't match the software/system. So I got a swapped out phone and was told that my phone would be labeled DOA. If anyone else is experiencing some goofy 4G or even location services issues, you may want to go to where you purchased your phone and see if there are some issues with your IMEI number. Oh and I've lost my apps that I had downloaded but the guys at Verizon claim that I would be able to re-download them once I signed into Google. So far no dice, am I doing something wrong or should I be doing something else?