Default S4 Temp n Humidity Sensor

It doesn't work. It's not giving me any temps or humidity readings. Used multiple apps still a no go. Used the *#0*# menu and it's not giving readings there either. So I figure hardware issue. I purchased the bottom piece with the USB port n mic n stuff on it. Tried that in it but it still not working. Also I now get no signal. It says no service. But when I put in back the old one I get back signal. What u think?

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