Samsung A157 Unlocked GSM Cell Phone with Internet Browser, 3G Capabilities, SMS & MMS and Speakerphone - Black This unlocked cell phone is compatible with GSM carriers like AT&T and T-Mobile. Not all carrier features may be supported. It will not work with CDMA carriers like Verizon Wireless, Alltel and Sprint. Easy-to-use clamshell phone for voice communication and text messaging 3G Data capable SMS & MMs; Loudspeaker Up to 6 hours of talk time, up to 240 hours (10 days) of standby time