With cellular, customers can go with just their Apple Watch and stay connected to people and information. To help Apple Watch Series 3 (GPS + Cellular) customers get started, DTAC will also offer a special introductory cellular trial.
To activate cellular service with Apple Watch Series 3 (GPS + Cellular), customers first need to update their iPhone to iOS 11.3 and watch OS 4.3, then tap Settings on iPhone > General > About and follow the prompt to update to the latest carrier settings.