Call forwarding enabled by itself

I have the t mobile note 4 that I am using on my ATT account. It is rooted with a custom rom. It has been working great. A little bit ago it made a sound I haven't heard before and on the screen it said call forwarding unconditional now set. So I can't receive any calls on it. I went to the phone settings and when I access the call forwarding screen everything is turned off and it says invalid network or SIM card. I'm pretty sure the SIM card is working because I can send text messages and connect to the LTE network. Any ideas what is going on ore how to fix it?

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