Repair an antenna, after fall.

Hi,

My phone fell badly and the screen broke.

The phone worked, and from a few tests I guessed that there was a problem with the mobile antenna (gsm), but I couldn't see anything since the screen broke.

the test was - someone called me over wifi and a regular call, the wifi call worked.

I ordered a new screen with frame and a few days ago I assembled it, and the screen works great, but the camera doesn't work and the mobile network doesn't work.

My question is - where is the antenna? how can I replace (or fix) it? how can I fix my camera? where can I order it?

Thanks, Itay