XElectron s79 is too costly smart watch but not have those features which deserves in this cost. It is very hangs and heated during charging. Its battery backup is too bad.its camera is very bad pictures are not clearly. It is like a phone but not calls it a perfect phone. When insert the sime card in it after some times is signals are automaticaly gone. Display of this watch is bad responding in other ways it is not smoothly touch display.dont buy this watch it is wastage of money. It is useless watch.