A:Answer Hello amberjo, thanks for asking! 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 phone. Don't worry, AT&T, Sprint, T-Mobile, and Verizon all offer plans for the LTE versions of Galaxy Watch, Galaxy Watch Active2, and Gear S3 models. Bluetooth versions will need to be within range of your phone to get the most out of all the features available. ^Elizabeth