Hello TC, great question! With this watch you can make and answer calls right from your wrist! You just need to make sure the watch is connected to your phone through Bluetooth or through a mobile network. Samsung has Bluetooth and LTE smart watches. This model only has Bluetooth connectivity. The LTE version can receive calls and messages without being connected to a phone. However, you'll first need to activate service for your watch through the same carrier as your mobile phone. Don't worry, AT&T, Sprint, T-Mobile, and Verizon all offer plans for the LTE versions of Galaxy Watch Active2. ^Elizabeth