Can’t make or receive calls after SIM card change

Hello @Jhpate27, we're happy to help with troubleshooting steps to resolve your call experience. 

If you recently changed your SIM card, make sure that the SIM is compatible with the device and has been activated in our Device activation portal. Once you have confirmed that your device is active try the following steps:

• Turn your phone off and back on.
• Try calling the number again.
• Make sure your software’s up to date: Go to att.com/softwareupdates.
• Confirm you have wireless service. Make sure you have a signal. Check our network coverage map.
• Turn off call forwarding. Press #21# on your phone and then the Call, Send, Talk, or Receiver key.
• Turn off airplane mode. Most phones show an airplane icon when airplane mode is on.
• Check your SIM card. You may have to take it out and put it back in if your phone displays Insert SIM or Emergency Call Only.
• Service suspended? Find out how to reactivate your wireless service.

None of the options worked

How's it going, Jhpate27? Thank you for using our recommended troubleshooting steps and letting us know if they were helpful.

Now that you confirmed you're still unable to make or receive phone calls we'd like to invite you into a direct message, so we can provide additional personalized troubleshooting which requires account access and details. 

In the meantime, try resetting your network setting to refresh your connection to the network. This option may cease failed calls.

Please note, Bluetooth pairing and Wi-Fi settings are deleted and will need to be re-added. You will not lose data like pictures, videos, or text.

• iPhone: Settings>General>Reset>Reset network settings

Don't forget to look for our direct message which is the chat icon next to the bell icon. The notification will appear in the upper right corner of the Forums.

We await your response!

Jonye, AT&T Community Specialist

I tried that but it still does the same thing. It still says call failed as soon as I dial any number and press talk.

Why did you change the SIM?  Do you still have the old SIM, and did it work with the old SIM?  If you can text (I’m talking actual MMS/SMS text, not iMessage), but not call, it could be that the SIM isn’t correctly provisioned.  Best avenue is to go into an AT&T corporate store and have them look at it, or try a new SIM.

I needed one for someone else but I didn’t know they had to be there so I gave them my info and they activated the SIM card to me so I had to replace it. Texting and FaceTime work just not phone calls. Yes I do still have the old sim and everything worked before. I tried getting a new sim again afterwards but it did the same thing.