Apple used advertising points to emphasize the need for this product to track fitness goals. The "3 Ring Goal" for tracking the users fitness level while the device is being used has been improved for accuracy and workout plans.[1] Apple Watch Series 3 added cellular connectivity for the first time in an Apple Watch. The four major US carriers (AT&T, Sprint Wireless, T-Mobile, and Verizon Wireless) all support Apple Watch Series 3 and use the same mobile number as the user's iPhone.