Commercial Fixed Wing
Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument; Flight Crew Multiengine
Distraction; Confusion; Situational Awareness
Deviation / Discrepancy - Procedural Published Material / Policy
General None Reported / Taken
Environment - Non Weather Related; Human Factors; Company Policy
I observed the C Flight Attendant in the jetway in close proximity to other Company Employees without her mask on. I informed her that Company policy required use of a mask. Instead of putting on her mask; she initiated a phone call on her mobile phone and proceeded to walk onto the aircraft and down the length of the cabin aisle to the rear galley.  It should be noted that while she walked down the aisle talking on her phone and with her mask off; there were approximately 12 through passengers on board the aircraft.
Air carrier Captain reported a Flight Attendant was not wearing a face mask and walking down the aisle of the aircraft with through passengers on board during a stop.