answer: #Person2# tells #Person1# #Person1# can use the cell phone during the boarding process and use the onboard phones during the flight.
documents: #Person1#: Good morning, welcome aboard.
  #Person2#: Good morning. Can I use my cellular phone during this time?
  #Person1#: Yes, you can use your cell phone during the boarding process until the aircraft door is closed.
  #Person2#: Thank you. What should I do if I want to phone my family during the flight?
  #Person1#: The aircraft is equipped with onboard phones. They do not interfere with the communication and navigation of the aircraft.
  #Person2#: So I can use the onboard phone during the flight?
  #Person1#: Of course. They will be used at anytime before or during flight.