Ever since I activated my ipad, my iPhone does not ring.

I set up my new iPad4 yesterday. After I set it up, my iPhone 5 stopped receiving phone calls. Everyone tells me they try to call me and my phone goes straight to voice mail. I have checked the settings on my phone and turned it off for 5 minutes and turned it back on. It still does not receive calls. Could this be related to the activation and set up of my iPad?