<BR/>SIM Recommend: <BR/>Smart Watch as an unlocked GSM mobile phone, support micro SIM card, we only provide Smartwatch, but no SIM card, please purchase additional GSM network SIM card, <BR/>We recommend SPEEDTALK SIM (belonging to T-mobile network), USA, or Cingular. . NOT SUPPORTED: Sprint, Verizon.,Att . (Other Country please info us your country and sim carriers.) <BR/>Smart watch SIM card needs to be enabled GPRS function and caller ID function, must be compatible with 2G of data traffic, watches currently only use 2G of data traffic. <BR/> <BR/>SIM card installation guide. <BR/>1. pen the watch dial on the back of the table cover <BR/>2. The card into the SIM card cover <BR/>3. Cover the SIM card that has installed into the dial <BR/>4. Start using <BR/><BR/>Features: <BR/>Screen: 1.44" <BR/>Material: ABS+PC <BR/>Resolution: 128*64 <BR/>Battery: 400mAh <BR/>Standby time: 2-3 days <BR/>Charging time: 1.5 hrs <BR/><BR/>Functions: <BR/>Touchscreen <BR/>Photographing <BR/>Flashlights <BR/>Two-way Conversation <BR/>Phone Book <BR/>Pedometer <BR/>SOS <BR/>GPS + Base station positioning <BR/>Voice intercom <BR/>Add friends <BR/>Alarm clock <BR/>Historical track <BR/>APP download <BR/><BR/> Package included: <BR/>1x Kids Smart Watch <BR/>1x USB Cable <BR/>1x User Manual