Overview
- The feature is live for iPhone 14 or later and Apple Watch Ultra 3 owners in Japan.
- It requires iOS 18 or later on iPhone and watchOS 26 or later on Apple Watch.
- After linking to a satellite, users can send and receive iMessage and SMS, use emoji, and add Tapbacks.
- When coverage is absent, iPhone prompts users to connect to the nearest satellite, with on‑screen guidance, Dynamic Island status, and a built‑in demo.
- The launch adds routine messaging to Japan's existing Emergency SOS and Find My location sharing over satellite, with access remaining free on supported devices.