Name of an electronic component
This looks like a "SWG" type connector with embedded switch,



Murata part number MM8030-2610RK0 or similar.

The idea of this connector is to provide a smooth connection to external antenna or for testing/diagnostics/calibration purpose of RF channel. 

In normal (unconnected) state the center pin is loaded with a termination resistor to avoid back reflections on RF signal, or to internal network connected to on-board antenna (PCB or special ceramic). 

When a special matching plug is connected, the center pin switches (mechanically) from the PCB network to the connected cable, maintaining good impedance matching.