Repaired face and now no signal

I broke the face of my iPhone 4S and immediately switched to another phone until I fixed the iPhone. I have followed all the instructions, all connections are in place, but when I turn on the phone, the "searching" signal does not go away. This phone has not been activated yet, so I can't get to the setting page on the phone. My iTunes doesn't even register the phone. All I get once the phone is up and running is the main welcome page "Hello slide to setup", choose a language, select country, and then it goes to "choose a wifi network". No wifi networks come up to choose from. I search for my home wifi and it doesn't find it. I connect to iTunes, and it doesn't register the phone. I have gone over my steps many times, including rechecking the antennas. I have also taken out and replaced the sim card many times. HELP!