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Learn why some devices don’t work on our network

Did you receive a message that your SIM card swap didn’t work or that your device won’t work on AT&T’s network? Find out why.

You received this message because you tried to use a device that isn’t supported on our network. The most common reasons a device won’t work are:
  • Some use cellular technology that is not compatible with our network.
  • Some don’t support our network’s frequency bands.
Devices that don’t use the same cellular technology and frequency bands as AT&T aren’t able to use our network services.

Find a device to use with AT&T

If you want to bring your own device, learn about devices that work on our network (PDF, 867KB).

Or, you can shop our best deals on AT&T Wireless or AT&T Prepaid devices.

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