AT&T has introduced NumberSync, a new service from the carrier that will allow you to use a single phone number across multiple devices to remain connected at all times. NumberSync is a network-based service, meaning it doesn't rely on a Bluetooth connection and your devices don't even have to be near each other for it to work. The idea behind it is to be able to have a single number that can work across multiple devices, so if you leave your smartphone at home you can use your smartwatch to keep in touch.
With NumberSync, you'll be able to send and receive texts and calls from your tablet or wearable using the same phone number that your friends and family recognize. AT&T is working to integrate NumberSync into future devices, with the first device launching soon. It's likely that the LG Watch Urbane 2nd Edition LTE is the first supported device, as the carrier has already announced that it would be carrying it. AT&T hopes to have additional devices with NumberSync support available this holiday season.