Learn how to sync an Android watch or tablet to your smartphone number so you can make and receive calls, even if your phone isn’t nearby.

Requirements

A smartphone can sync with up to five AndroidTM tablets and five Android watches – or four Android watches and one Alexa app.

FYI: FirstNet® subscribers, learn how to add NumberSync.


Watches
  • A smartphone on an active AT&T WirelessSM plan with the latest version of the watch app installed (Note: AT&T Prepaid® isn’t supported)
  • An Android watch on an AT&T Wireless plan
  • An AT&T user ID associated with the smartphone (get more info)

Tablets
  • An Android phone on an active AT&T Wireless plan
  • An eligible AT&T Android tablet1 connected to the internet
  • An AT&T user ID associated with the smartphone (get more info) 

Sync and use an Android watch

Make calls using your watch with NumberSync, even if it isn’t nearby. (Your watch can only sync to one smartphone at a time.)  

  1. Open the watch app on your phone.
  2. Follow the in-app steps to set up NumberSync.

In addition to making calls, you can also get notices and listen to your smartphone’s voicemail on the watch.

Want device-specific instructions? Go to Device Support, select your device, and enter NumberSync in the search field. If you’re still having trouble, you can get help with NumberSync issues.

Connect to our network

An Android watch connects in two different modes.

  • Bluetooth®: The watch uses Bluetooth to communicate with your phone when they’re close together. When you make or receive a call on the watch, your phone handles the call but sends it to your watch. The smartphone also shares its data with the watch. Turning on airplane mode might not stop this connection.
  • Cellular: When the watch isn't in Bluetooth range, it connects to our network for talk and data service. 

Remove NumberSync

If you want to unsync your Android watch to resync to another phone:

  1. Open the Watch app on your phone.
  2. Tap Watch settings, then Mobile plans.
  3. Select NumberSync and then Deactivate.
  4. Wait for the process to finish before you sync your new phone.

FYI: To remove NumberSync or to cancel your watch plan, contact us.

See all important details

Set up NumberSync

Sync and use your Android tablet with NumberSync. One smartphone number lets you make and receive voice and AT&T video calls from any of your screens.

To sync your smartphone:

  1. Tap the phone icon on your tablet home screen, then tap Next.
  2. Enter the user ID for the mobile number you want to sync with the tablet.
  3. Reply to the text we sent with the passphrase to authenticate. We sent it to the number linked to your user ID.
  4. Follow the prompts to complete the setup. 
  5. Tap the phone icon and then Contacts or Keypad to make a call.

Want device-specific instructions? Go to Device Support, select your device, and enter NumberSync in the search field. If you’re still having trouble, you can get help with NumberSync issues.

Remove NumberSync

To unsync your Android tablet:

  1. Tap the phone icon on your tablet home screen.
  2. Select the keypad icon, then three dots.
  3. Tap NumberSync settings, then choose Log out and OK.

Bill details overview

Check your individual plans to confirm specific billing and usage charges.

Your iPhone plan will show:

  • Calls on the watch via Bluetooth®
  • Data accessed from your watch via Bluetooth
  • Calls on tablet

Your watch plan will show:

  • Calls or data used when the watch is active on our wireless network

Your data plan for tablets will show:

  • Data used when the tablet is active on our wireless network1

FYI: Check the usage details on your bill and look for Wi-Fi or NBSSCall to identify NumberSync calls.

Calls using NumberSync outside of our coverage area

Watches

NumberSync isn’t available. It doesn’t support roaming outside of the United States, Puerto Rico, and the U.S. Virgin Islands (our coverage area).

Tablets

If you use a Wi-Fi connection on the tablet to call:

  • International numbers: You’ll pay international long-distance rates based on your phone plan. See att.com/international for info.
  • Any other number: You’ll pay regular rates.

If you use cellular data on the tablet to make a call, it gets billed to your data plan. But if you’re roaming outside of our coverage area, you’ll pay international roaming rates for data usage.

See all important details

Last updated: November 19, 2025

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