You can FaceTime on your Apple Watch, but only using FaceTime audio – not video. Here's how to do it, and why it may be ...
Make sure Apple Watch and old iPhone are updated and synced to iCloud > back up old phone > set up new phone. When asked to use Apple Watch, select Continue > keep devices close > follow on-screen ...
You can turn off Airplane Mode on your Apple Watch with a few quick swipes or through the Watch app on your iPhone.