iPhone 4 service + 3G signal fluctuating (full bars - no service)

[WherEmEweeD]

I took my iphone apart to replace the screen and now that i have it looking nice i have realized the service and 3g jump from full bar to no service.

signal is worse when moving or holding the phone.

I have replaced the antenna for service but no different.

I have also turned mobile data + 3g off but the service signal has same issue.

I have reset the phone and the network settings. with no luck.

I also put electrical tape around the metal frame but still no luck.

I will now try to jailbreak it to hack firmware if i can find my usb cabl​e

 

[WherEmEweeD]

Does anybody have a pic of the iphone 4 grounding clip/parts so i can start from scratch and rebuild the phone.