You should probably check the APN or Access Point Name. AT&T and the rival carriers all have them and it's their gateway between the cellular network and the internet.

If your APN settings aren't just right, then you may not be able to send or receive multimedia messages (MMS) and you may not receive cellular data or calling features such as Voice over LTE (VoLTE).

What is an APN?

APN is the Access Point Name, which is kind of like your phone's password to the internet. You need the APN settings for you to be able to access AT&T's LTE network.

Entering the APN helps the carrier decide what type of connection needs to be made, which IP address to assign and what type of security method needs to be used.

Can I put AT&T's APN settings into any unlocked phone?

You will for sure need an AT&T SIM card, but so long as your phone is compatible with AT&T's network, you should be good to go.

What are AT&T's APN settings?

You can find the APN settings in your phone's mobile network settings.

  • Name: ATT Phone
  • APN: phone
  • Proxy: not set
  • Port: not set
  • Username: not set
  • Password: not set
  • Server: not set
  • MMSC:
  • MMS proxy:
  • MMS port: 80
  • MCC: 310
  • MNC: 410
  • Authentication type: None
  • APN type: default,mms, supl, hipri
  • APN Protocol: IPv4
  • Bearer: Unspecified