I have the iPhone SE and having problems with phone capabilities of tried everything up to removing the Sim card and reinstalling everything else is working. could this be an antenna disconnect?

Hi I have the iPhone SE and have been experiencing issues with network and have done everything suggested up to removing and replacing the SIM card and still saying searching. Would this be a disconnected antenna and is there a way to determine if this is what the problem is? I have all other services and capabilities working aside from the phone use