New sim activation problems

[goreilly121]

I just bought a sim for my phone and the 40$ AT&T prepaid subscription. Iv put the sim into my phone and have followed the instructions on on the back of the card but when I enter my pin number after typing *888*, it says invalid MMI number or connection problem. i don't think it is a connection problem as my phone indicates I have connection.

[ATTCares · Accepted solution]

Hello, @goreilly121,

We'd love to help with this. Here are the steps to activate your new prepaid SIM and account. Click on the preceding link and follow the steps under Activate physical SIM online. If this doesn't help you, you will want to try to go to an AT&T Store for assistance.

Have a great week!

James, AT&T Community Specialist