So a couple things to answer your questions. No pilot is required to answer their cell phone while at the airport. Full stop. No exceptions. Line holders or reserve included. We have airport standby and they have phones in the crew room but if you don’t want to hang out there then the cell phone is an option. We have “email” we have to check every day on duty. Pilots on RAP have to return calls within 15 minutes.

Your SWAP is what we would call “schedule integrity”. We have a clause where they can reassign us for any reason. It still has to finish with in 3 hours of the original sequence. We have OSO Off Schedule Opperations where if your last flight cancels then they can make you stay and wait for reassignment for four hours or the scheduled end of duty which ever is earlier.