My Verizon iPhone 5s has no cellular service. It just says "searching" in the upper left corner. I'm not receiving any texts or emails and can't make calls. For the last few days it has been going into that "Searching" mode every now and then, but today it hasn't had service at all. I'm in my office where I normally have perfect service so I know it's an issue with the phone. I've rebooted, I've tried turning the wifi on and off, I've confirmed I'm not in aiplane mode, I've turned the cellular data on and off. Nada. Any ideas before I got waste my life at the Apple or Verizon store?