With AT&T's NumberSync, the Samsung Gear S2 shares your handset's phone number
With NumberSync, you can also use the Samsung Gear S2 to send texts or make calls from your wrist. AT&T is selling the Tizen powered wearable for $99.99 with a two-year agreement. Those purchasing the smartwatch from AT&T starting today, will find NumberSync already installed on the device. A Mobile Share Value plan is required. New Plans start at $30 a month, while the watch can be added to an existing plan for as little as $10 a month.
With NumberSync, you don't have to be anywhere near your smartphone to make or take calls using the phone number assigned to the handset. In fact, even if your phone is turned off, you can still make/take calls and texts on your NumberSync supported device.
As for the Gear S2, we just called the the timepiece the best smartwatch of 2015, beating out the Apple Watch.
source: AT&T via AndroidCentral