TP2 Antenna / Reception

[enzyme]

Does the tp2 use a physical antenna at all or is it all software based? I am getting no more than 2 bars at anytime. Once in a long while it will be full bars for one tick for 2 secs then back to 2 bars or less. I live in the inner city so it is definitely not area coverage. This has never happened before. I have tried with many different roms including stock and its still the same.

This started happening after I replaced the screen half of the phone. I ask about the antenna because I still have almost a complete spare phone in parts that I can use to swap parts if I need to. Anyone with insight on this?