Chosen Solution

I replaced yesterday my dock connector of my iPhone 7. After I installed everyting back together and started the phone, the celullar wasn’t working anymore. It says: No Service. I removed the dock connector, started the phone without any dock connector and the cellular works fine. Is the antenna on the dock connector broken? Who could help me?

Replaced the dock again and now it is working. Seems like the new dock was faulty.