u/9nein

Hello,

I will be flying BA shortly and wanting to accrue mileage into my American Airlines account, have entered my AAdvantage number on the itinerary.

If I wish to avail of the free inflight messaging so if I sign up for a BA Club account on-board, will this action replace the AA number I have given for mileage accrual on my itinerary?

EDIT: Thank you for your responses everyone!