What does this message mean when I turn on my iphone?

My iphone first had no service when this happened. I hadnt activated the sim card yet. Its been factory reset because i got it from someone. When i turned it on with the sim card inside a voicemail pops up and asks me to listen. I listened to it and it says "the services you are trying to use have been restricted or not available" what does that mean? Today i activated my sim card and i'm transfering over my phone number. The voicemail is still there and i can't call out. Is it because my phone number isn't transfered over yet and i still don't have any service? Its been hours and it usually doesn't take this long for the transfer. Does this message mean something else?

I would give your cellular provider a call