Q2 4G Smart Watch Waterproof 3G 2G Bluetooth Watch WiFi GPS Touch Screen Soft Silicone Strap Camera Heart Rate Pedometer Sports Smartwatch Location Call SOS for Man Woman Kids (Black Blue)

not for AT&T - maybe Tmo -- NOT 720mah performanceif you make the mistake of buying this model, once you are out of warranty I bet a take apart will show a 4XXmah batteryregardless, with all radio/data etc off 24 hours standby does not compare to the zeblaze thor 4 580mah getting 10 days standby (no radios, 3g, etc.). This finow lost all other standby tests by a large margin. Side by side rapid drain either model had 3.3 hours talk time, tho. Would be hard to get thru a day with this.Aside from the battery my model has a usb data problem: it drops out of connect mode every half second unless the data cable is punched by hand (and no amount of rubber bands around this odd charger will keep it down tight enough).Really a shame as the fit is very comfy and looks ok - look for something else.