It’s simple. When you pair your Apple Watch Series 4 (GPS + Cellular) with your iPhone, you will be prompted to set up cellular service with your provider. Or you can set up service later using the Watch app on your iPhone.
Apple Watch Series 4 (GPS) uses the network connection of your nearby iPhone to send and receive text messages, answer phone calls and receive notifications. The built-in GPS works independently of your iPhone for distance, pace and route mapping in workouts. And you can do many other things independent of your iPhone, like measure your heart rate, play locally stored music and pay with Apple Pay.
Apple Watch Series 4 (GPS + Cellular) features built-in cellular connectivity, giving you the freedom to stay fully connected with just your Apple Watch. You can make and receive phone calls, reply to messages and get notifications even when you don’t have your iPhone with you.
Some straps are sold separately. Some features are not available in all regions or all languages.
Apple Watch Series 4 (GPS + Cellular) requires an iPhone 6 or later with iOS 12 or later. Wireless service plan required for cellular service. Apple Watch and iPhone service provider must be the same. Not available with all service providers. Not all service providers support business accounts or pay-as-you-go plans; check with your employer and service provider. Some legacy plans may not be compatible. Roaming is not available. Contact your service provider for more details.
To learn more about wearing Apple Watch, getting a good fit, potential skin sensitivity, and proper care and cleaning, click here.