Post Screen Replacement Signal Issues

Last week, Precious hit the parking lot at work and the screen shattered.

I ordered a replacement screen online, and followed the iFixit teardown to disassemble Precious, and rebuild it.

New screen works great, no dead pixels, no touch issues.

However, I'm terrified that I have damaged the antennas when removing the back panel.

I don't have any raw numbers from before, but I'd estimate that I'm getting about half as much signal strength as before. Prior to the replacement (even after the screen was cracked) I managed ~2 bars in my basement, and large buildings. Max strength outside. After screen replacement, I have no signal in my basement, and can barely maintain a data connection while inside large buildings (work, malls, etc).

I opened it back up to ensure that everything was reassembled properly, and everything LOOKS right. When removing the back panel I don't feel like I cause much torque to the case, but now I'm not sure.

Is it possible that I damaged the antenna during removal? Does anyone know how I can test the antennas? Any other ideas?

I appreciate any suggestions!

Thanks

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