Set up NumberSync for Apple devices
You can use up to 5 secondary Apple devices to make and receive calls using your iPhone’s wireless number.
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Use NumberSync with secondary devices
Before you start, make sure you:
To set up NumberSync℠:
iPad or iPod touch
Mac
- Sign in to iCloud® and FaceTime® with the same Apple ID on all compatible devices you want to sync.
- Set FaceTime Caller ID on your other devices to your iPhone number.
To set up NumberSync℠:
- On your iPhone, go to Settings and then Phone.
- Select Wi-Fi Calling, toggle it to On, and follow the prompts.
- Tap the back arrow to return to Phone and select Calls on Other Devices.
- If Allow Calls on Other Devices is off, toggle it On. The compatible devices you signed in to iCloud with the same Apple ID will be listed under Allow Calls On.
- Select Add Wi-Fi Calling for Other Devices, and follow along until you reach the NumberSync prompt.
- Check your secondary Apple device for a pop-up with a 6-digit code to enable Wi-Fi Calling. Don’t see a pop-up? Open your other device’s FaceTime settings and turn on Calls from Phone.
- Enter the 6-digit code into the pop-up on your iPhone and tap Allow.
- Select Ok when your secondary Apple device shows a pop-up about emergency calls. Complete any requested emergency address info.
Set up a secondary device later
If you’d rather turn the service on later, you can do that too.iPad or iPod touch
- Go to Settings and then FaceTime.
- Choose Calls from iPhone and tap Upgrade to Wi-Fi Calling.
Mac
- Open FaceTime, then Preferences.
- Choose Settings, then Calls from iPhone and Upgrade to Wi-Fi Calling.
Use a secondary device to make calls
Make calls from your iPad®, iPod touch®, or Mac®:
Or, from your Apple Watch® (non-cellular)
Good to know: Want to use your Apple watch as a secondary device without your iPhone? Connect both devices to the same Wi-Fi network at the same time at least once. If you connect your Apple Watch to Wi-Fi in a place where your iPhone hasn’t connected, it can’t use your iPhone number to make or receive calls.
- Open FaceTime and select Audio.
- Choose a contact or enter a phone number.
- Select the phone icon to make your call.
Or, from your Apple Watch® (non-cellular)
- Open the Phone app.
- Select a contact or number from your call log or use Siri.
- Tap the phone icon to make your call.
Good to know: Want to use your Apple watch as a secondary device without your iPhone? Connect both devices to the same Wi-Fi network at the same time at least once. If you connect your Apple Watch to Wi-Fi in a place where your iPhone hasn’t connected, it can’t use your iPhone number to make or receive calls.
Unsync your Apple device
- From your device, go to Settings and select Phone.
- Choose Calls on Other Devices.
- In the list of devices, turn off Wi-Fi Calling for the device you want to remove.
Want more help? Get step-by-step support for your device at att.com/devicesupport.
Last updated: June 1, 2023