Apple

Turn your other Apple devices into additional phones that all share the same AT&T smartphone number as your iPhone. You don't need a separate number to make or receive calls on your other devices. What’s more, you can make a call over Wi-Fi or an AT&T mobile broadband connection without even having your smartphone powered on.
 

 

Compatible NumberSync devices:

  • Most iPad device running iOS 9.3 or later
  • Apple Watch Series 1, 2, or 3 running watch OS 2 or later (non-cellular)
  • Most iPod touch devices running iOS 9.3 or later
  •   Most Mac computers running OS X El Capitan

For information on Apple Watch Series 3 with cellular, see the Apple Watch (Cellular) tab.

Note: To use NumberSync, all Apple devices must share the same Apple ID. Also, your compatible synced device will need a Wi-Fi or wired broadband connection. See the frequently asked questions below for more information.
 
 

Apple FAQ

What is required to use NumberSync?

    • Your mobile phone must be an iPhone 6, 6 Plus, 6s, or 6s Plus running iOS 9.3 or later.
    • You must enable Wi-Fi Calling on your iPhone first. For information on how to set up Wi-Fi Calling, visit the Wi-Fi Calling support page.
    • You need to have a compatible NumberSync device. Your smartphone and compatible devices must share the same Apple ID.
    • Your NumberSync device must have access to a broadband connection. This can be over Wi-Fi, wired broadband, or AT&T mobile broadband.
    • For more about setting up NumberSync, please visit the NumberSync support page.

How do I set up NumberSync?

How is NumberSync different from Apple Continuity (introduced in iOS 8)?

    NumberSync works even if your iPhone is turned off or your Apple devices are on different Wi-Fi networks. With NumberSync, the synced devices just need to have access to the Internet with a Wi-Fi, wired broadband, or AT&T mobile broadband.

How much does NumberSync cost? Does it count against my wireless minutes?

    There is no additional cost for using NumberSync.

    There are no voice airtime use charges if you use NumberSync to make calls to or from the U.S., Puerto Rico, or the U.S. Virgin Islands. For international calls, international long distance rates apply based on your smartphone’s rate plan or International Long Distance package. You also will be billed standard data charges under your tablet’s plan if you use NumberSync over the AT&T mobile broadband network. This includes standard rates in the U.S., Puerto Rico, and the U.S. Virgin Islands. It also includes international roaming data rates when traveling abroad.  

Can I use my NumberSync devices to make calls while traveling outside the U.S., P.R., or U.S.V.I.?

    Yes. You can make NumberSync calls by connecting to the Internet through an international Wi-Fi hotspot. NumberSync calls to domestic numbers incur no voice airtime or usage charges. Calls to international numbers incur International Long Distance charges based on your smartphone rate plan or International Long Distance package.

How many of my devices can I sync at the same time?

    You can sync up to five compatible devices with NumberSync.

Will all of my synced devices ring at the same time for inbound calls?

    Yes, if all of the devices have NumberSync turned on, all your devices will ring. You can manually turn NumberSync off for each device.

Can I use NumberSync to make calls from my TTY device?

    No. NumberSync will not support calls over TTY devices, including 911 calls. To reach 911 service, persons with communications disabilities can use Real-Time Text (www.att.com/RTT) as an alternative to TTY. 911 services can be reached by either (1) calling 911 using Real-Time Text , or (2) calling 911 directly using a TTY over the cellular network or from a landline telephone, or (3) sending a text message to 911 directly (in areas where text-to-911 is available) from a wireless device, or (4) using relay services to place a TTY or captioned telephone service (CTS) call from a wireless phone over the cellular network or from a landline telephone, or (5) using relay services to place a IP Relay or IP CTS call over a cellular data or other IP network. Real-Time Text is not supported on all secondary devices like some wearables and PCs.

What is Real-Time Text?

    Real-Time Text (RTT), is a feature that enables a conversation of text and voice for persons with disabilities who wish to make every day and emergency calls like 911. With RTT, you start the text conversation like a voice call but unlike instant messaging and SMS, both persons engaged in the conversation see each text character appear on their device as they are sent. Get more information on how to use Real-Time Text at att.com/RTT.

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