Q: In my settings I am trying to use my iMessage and face time through my phone, but it is frozen saying "waiting for activation..."  How do I fix this so I can iMessage and FaceTime?

I am trying to turn on my IMessage and FaceTime features on my iPhone 4S.  When I go to settings, iMessage or FaceTime, and turn them on, it is frozen saying "waiting on activation..."  How do I fix this so I can use my phone?