Flylinktech&reg; new S28 1.54 inch Touch Screen Smart Bluetooth Watch Phone support SIM card with FM Pedometer Sound Recorder Anti-Lost Sleep Moniter sync function for Android Smartphone (silver) Asmart center new S28 1.54 inch Touch Screen Smart Bluetooth Watch Phone support SIM card with FM Pedometer Sound Recorder Anti-Lost Sleep Moniter sync function for Android Smartphone (silver) 1.54" capacitive touch screen,Support SIM card,can realize basic call and SMS function. Phone sync: Smart bluetooth sync all push notifications: call, phonebook, music, SMS, facebook, twitter, email, QQ, wechat etc.(need APK) Other function: dial, pedometer, sleep monitor, FM radio, alarm, calendar, audio/video play, file manager, anti-lost, remote capture (need APK), sound recorder etc. Unlocked phone,can be used a phone when your smart phone out of power. Support TF card up to 8GB. Unlocked cell phones are compatible with GSM carriers but are not compatible with CDMA Carriers.