No 3G/4G (only EDGE) on iPhone 5s 32 GB after water damage?

Hi,

after a small water damage my homebutton and the internetconnection wasnt working properly.

I still get EDGE connection but no more 3G.

So i exchanged the homebutton and the dock connector module (which was said to have the 3g antenna included).

The homebutton is working again, but still just EDGE.

Any idea what to do?

Thank you very much in advance.

Greets,

Lenny