RF-BlueSMiRF MOSFET part number?

I think I’ve blown part of my RF-BlueSMiRF up by misconecting two pins: PWR into GND, and GND into TX (yuck!)

A connection can still be established, but nothing comes out of the TX pin.

RX doesn’t seem to work either but I have to double-check it.

I suspect the SOT-23 MOSFET is damaged , does anyone know which part number it is?

Kind regards,

Javier