
Service providers determine which phone models work on their networks. So when you're replacing your phone, use this cell phone guide to help you decide whether you'll stay with your current cellular service carrier or switch to a new one. Major carriers use one of two digital networks: CDMA (Alltel, Sprint, and Verizon) or GSM (AT&T and T-Mobile). The network plays a big part in the capabilities your phone will have and, to some extent, its performance.
When you’re ready to buy a phone, you’ll first have to decide which of the two types, conventional cell or smart, meets your needs and budget. Choose a conventional model if you need only voice and text-messaging capability, and perhaps a music player and camera. Smart phones, with their advanced operating systems, QWERTY keyboards, and other PDA-like features, are a better choice for people who need frequent access to e-mails, an organizer for appointments and contacts, and Internet-based services.
Useful features such as support for wireless Bluetooth headsets, GPS navigation, and high-speed data access can greatly enhance user satisfaction.