PALM Centro Quad-band Smartphone - Unlocked Display - 320x320 pixel transflective color touch screen, supports 16-bit color (up to 65K colors) Radio - GSM/GPRS/EDGE class 10 radio, quad band world phone (850/900/1800/1900MHz) Platform - Palm OS by ACCESS 5.4.9 Bluetooth v1.2 Memory - up to 64MB available user storage