Being near a city in the same state doesn't always cut it. If the PRL was updated recently and you are still in the same region, reupdating it will not help. Inside your phone is a network setting that allows "Home Only" and "Standard Scan" options. It varies per phone model where you get to this setting, but it's there. Setting Standard Sacn, or sometimes called Automatic, will allow your phone to use other towers and not just USCC towers. Home Only prevents your phone from roaming by using other towers. Don't let it worry you that I'm telling you to let your phone roam. As long as you are in your home area (or you are on a national plan) you will not get charged for your roaming and you will get reception from other carriers which may exist in that city where USCC might not. Remember they're regional afterall. Awesome where they exist, but not existing everywhere. But if you have good reception at home and bad reception in another spot, the issue is not your phone failing, it is either settings, or the area you are going to does not have cell coverage (Not counting
GSM coverage which is not compatible with USCCs
CDMA network, the network MOST carriers use is
CDMA)