iMessage and Facetime not working

I have iPhone 5 running iOS 7.1.2. I unable to activate iMessage and FaceTime. I have tried to Reset the network setting, reset whole phone, turned iMessage and FaceTime on and off but no luck. This problem occured when I switched my SIM card to other network and then again switched back my SIM to orignal network on which I was using iPhone for years. My number is shows when I go to Setting and then to "Phone":

In iMessage Menu I am unable to see my number displayed there:

Same is the case in FaceTime Menu as well: Please Help me in solving this problem.