Apple Watch
When using Apple Watch , my phone doesn’t make any sound for messages or calls ?
Apple Watch Series 3, watchOS 7
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Where you’ll see your notifications
Notifications go to either your Apple Watch or iPhone, but not both. Learn when a notification might appear on your iPhone, instead of your Apple Watch, below.
If your iPhone is unlocked, you'll get notifications on your iPhone, instead of your Apple Watch.
If your iPhone is locked or asleep, you'll get notifications on your Apple Watch, unless your Apple Watch is locked with your passcode.
Some apps, such as the Noise app, are only on your Apple Watch. Notifications for these apps don't appear on your iPhone.