Android tablets

NumberSync for Android tablets

With NumberSync, you can use your smartphone number to make and receive calls on your tablet. Use the same number your friends, family, and colleagues already know. NumberSync even works if your smartphone isn’t with you, nearby, or powered on.

  • Voice and AT&T Video Call: Now you have two ways to call
  • One number: Calls and texts* from your tablet will display as your smartphone number
  • Simultaneous ring: Calls to your mobile phone will ring all synced devices at the same time

*Data rates may apply. Texting requires use of the AT&T Messages app.

Devices that support NumberSync

To use NumberSyncSM for tablets, you need an AT&T HD Voice enabled smartphone. Visit att.com/hdvoice for more information and a list of devices that support AT&T HD Voice.

To use video calling on your tablet, you need a smartphone that supports AT&T Video Call.

Select Shop now to see if your tablet supports NumberSync or to purchase a compatible tablet.

Android FAQ

What is NumberSync?

    NumberSync allows you to sync your AT&T smartphone number with an Android tablet to make and receive voice and Video Calls using your smartphone number as the caller ID.

What’s required to use NumberSync?

    • You need an AT&T smartphone with HD Voice service enabled (for voice-only service).
    • To use AT&T Video Call service on the tablet, you need an AT&T Video Call-capable smartphone.
    • You need an eligible tablet designed to be used with AT&T service.
    • You need access to a broadband Internet connection (Wi-Fi, AT&T mobile broadband, etc.) for your tablet device.
      Note: When using Wi-Fi, call quality may vary depending on the strength of the Wi-Fi network.

How do I set up NumberSync?

How much does NumberSync cost?

      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 tablet with NumberSync service to make calls while traveling outside of the US?

    Yes, if you are connected to the Internet. Calls made from outside the United States are charged as follows.

    • Calls from Internet-enabled Wi-Fi hotspots
        o Calls are billed the same as for a domestic Wi-Fi hotspot

    • Calls from the cellular data network of your roaming partner
        o These calls will be subject to international data roaming charges. Actual charges will be based on your tablet’s data rate plan.

    • Wi-Fi calls made to U.S. numbers
        o These are billed the same as domestic calls no matter what country you are calling from.

    • Wi-Fi calls made to non-U.S. numbers
        o Charges for these calls are based on your smartphone’s rate plan or international long distance package.

How many 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 your devices have NumberSync turned on, all your devices will ring. You can manually turn NumberSync off for each device by following the instructions in the support article about NumberSync for Android tablets.

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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