Oasis Bluetooth Smart Watch With Camera and Sim Card Support With Apps like Facebook and WhatsApp For All 3G & 4G Android/IOS Smartphones Smartwatch(Black Strap M)

Sport health: Pedometer,sedentary remind,sleep monitoring.? Phone function(GSM and 2G only): Make phone call directly from the smart watch,including answering and dial-up.SIM slot,support make calls by Bluetooth or smart watch. Trouble shooting steps * Don't plug the charger in high voltage power sockets. * Don't left charger ON after removing watch from charging. * Don't left charger ON at night. * It doesn't support 4G sim card,and also we have mentioned this in user manual. * It has battery backup in standby mode but using all the features at a time will reduce battery backup. * We always ship new product but sometimes we send the return packages by checking them initially. * Due to overcharging battery always bulged out,ideal charging time is max 2 hours