CELL PHONES Low End High End  PHOTO COURTESY OF SONY ERICSSON    SONY ERICSSON T637   For AT&T Wireless and Cingular   Suggested Retail: From $80 up to $270   (Depending on carrier and rebate)   sonyericsson.com, attwireless.com, cingular.com

Sony Ericsson T637 for AT&T Wireless and Cingular
The brand-new T637 is a perfect fit for kids who aren't afraid of new technologies. There's a camera and integrated AOL Instant Messenger for maximum social exposure. The artistically inclined can design their phone's wallpaper on a PC, then wirelessly transmit the image file to the phone using its built-in Bluetooth networking. There's even a music programmer for designing ringtones. Trust us, for left-brain types, this phone can provide hours of unexpected fun. While pricing of the handset fluctuates wildly, the basic pricing is this: Cingular customers should expect to pay $130, but receive an additional $50 off in the form of a mail-in rebate. AT&T Wireless customers will have to pay $150 after an instant rebate of $120.