Default Broken mobile chip/antenna

Hi guys,

Had an accident with my N5.
Truns out it doesn't function that well after being sandwiched between a floor and a foot.
Screen was broken. So I ordered a new screen complete with frame attached.
Transplanted all the components and voila it worked!
So I thought. After some inspection it appeared the mobile antenna/chip was broken.
I could get a WiFi connection but no GSM or LTE anymore.
When I put in the SIM it says "restart device" etc. So SIM detection works.
It just says "No signal - T-Mobile" afterwards.
I think the GSM chip is just broken.

Any thoughts? Suggestions are greatly appreciated.


Nexus 5 16GB
Nexus 7 32GB (2013)