Incredibly weird reception and signal problems.

Hello,

My name is Daan and I am from Holland. You are my last hope to fix my Iphone 4s, 32 Gb.

The symtoms:

1) When inserting the SIMcard it takes a lot more time then usual to find a signal. After a few minutes it's there.

2) It's says it has full signal strength for a few minutes, then goes back to one dot, then searching again, then full signal and so on. To my opinion it's a repeating loop. During this loop no calls can be made or be received, no texts can be sent.

BUT on a very, very rare occasion a call is possible or a text comes in.

3) Internet signal is always GPRS, sometimes E for a short moment. I have never seen 3G. Still, browsing is never possible, it always says it's not connected to the internet.

4) I get Wifi only really close to the router. Even though it gets a full signal then, browsing is never possible, it always says it's not connected to the internet.

Things I've done so far:

1) Trying different good working SIMcards, I get the exact same symptoms. Put mine in a different Iphone, it's working properly. Also tried different locations in town.

2) Tried different good working antenna's. Replaced both the Wifi antenna and the one connected to the speaker.

3) Did a restore in DFU-mode and restored the network settings multiple times.

Thing I shouldn't have done:

There's a antenna-cable running on the backside of the logic board. Both ends are connected to the logic board. For some reason I unattached one contact point, only to find out it was secured with some kind of glue or something. Was that a mistake??

Please help. Thank you. Daan