My phone number isn't connected to my iMessage and FaceTime

I just got a new phone because I wanted to switch carriers. It's the same model though, iPhone 7. On my old iPhone 7 I had no problems at ALL! But on my new iPhone 7, my number isn't connected to my iMessages and FaceTime, only my Apple ID is. I want to connect my phone number to my imessages and facetime. I went to my iCloud and saw that my phone number wasn't connected there, so I added it to my Apple ID and I thought maybe that would work, but it didn't. I SEE my number as an option for "Send and Receive," but when I tap it, it doesn't do anything (this is under iMessages btw). Also when I do the same thing for FaceTime, it just says "FaceTime activiation error" or something like that. But it works fine for my Apple ID. Please help!!