i cant seem to get a signal...
this is because of the white antenna cable inside the iphone

the white antenna cable wont stay on the communication board, this is because i accidently lifted the connector along with the white cable off the board...

There's no way I can get the connector back on...any ideas on how to keep the wire on the board?

Well, you should check out iFixit Guides if you want to repair it yourself. You could also order spare parts from the iFixit's online store.

Or as a another solution find a technical service that you can get your iPhone to.

They only way i see that working is using something like a modeling glue gun which will hold the whole thing to the board, no soldering required.