This fitness band will only work after installing fitness band application from play store.TO set time of watch you have to install fitness band application.YOU will receive bar code Please scan it to download the application. Switch ON Bluetooth and location while connecting fitness band from app. Dont connect band directly with Bluetooth u need to connect it from APP.How To Set Time & Date- Need To Install APP To Set Time & Date Only Than it Will Work.No calling and SMS read or typing feature u will Received only notification. cal Received /reject can be done with it.