System: Android version 6.0 and above & IOS version 11.0 and above. SystemAndroid version 6.0 and above & IOS version 11.0 and above. 2 Working Modes: Once inserting your SIM card, the watch can work as a real smart phone, or for more features download “HEBSWatch” APP and connect this smart watch to your smart phone via Bluetooth. Leia Mais