I bought this watch last month hoping it would be an upgrade for my son's Chinese brand-less GPS watch since he's older now and the strap broke, unfortunately the X6Play watch and mobile app are riddled with malfunctions: - GPS has showed me incorrect locations 10 KM away while my child was at the neighbors house 300 meters away from us. - School schedule doesn't work properly. Even after the school schedule has ended, the watch rejects calls and in-app messages where I get an automatic response that it's in school mode. Only way to be able to reach him is to forcefully turn off the school mode setting - 75% of the time, the watch is unable to update its location on demand - Last but not least, the app stopped working completely and I had to delete it and reinstall it now to try and see if I can at least get some function from this horrible watch. If I could undo my purchase and get my money back and go back to the brandless watch, I would definitely do that. The brandless watch was more reliable in terms of provide location updates and having additional features such as whatsapp and in-app calling and many more.