IPhone 4S not recieving or making calls?

My wife's screen on her iphone cracked, so I removed the aim card out of mine and tried to put hers in mine. Stupid me the SIM cards were differnt sizes as hers is a iPhone 5c and mine is an iPhone 4S. After all the trouble was done I put mine back in and now I can't receive or make phone calls, but my Internet and texting is working. Any ideas if how to fix this?

Try resetting network settings or a soft reset. Hold down the home key and the power key at the same time until the apple appears and then let the phone reboot. Settings>General>Reset>Reset Network Settings.

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