Moderator, Iberia Airlines, Airport Lounges, and Ambassador, British Airways Executive Club
Join Date: Feb 2010
Programs: BA Lifetime Gold; Flying Blue Life Platinum; LH Sen.; Hilton Diamond; Kemal Kebabs Prized Customer
Posts: 63,726
If you are having trouble with the App online check-in, try the full BA.com site and email the PDF to your phone. That seems to be just about working now.
Keep trying, it took be about 4 goes in all to get it to work.