Samsung T359 Smiley Unlocked Phone with QWERTY Keyboard and 1.3MP Camera - Unlocked Phone - US Warranty - Black/Blue
Its 1000 mAh lithium-ion battery is rated at up to 6 hours of talk time, and up to 456 hours (19 days) of standby time. It runs on the 850/900/1800/1900 MHz GSM/GPRS/EDGE frequencies, as well as T-Mobile's 3G network (1700/2100 MHz).