So, I've been traveling internationally since I was 16. Have booked online since "CheapTickets" was actually cheap. But I've never run across this. Am booking an inter-Europe flight and one of the data fields, right after the address is "Number". I've tried my house number, I've tried, 0 and 1, I've tried last 4 of my phone...
The error message reads:
"You have to specify at least a number between phone and mobile."
Which is about as helpful as having my three year old nephew explain it to me.... Any Help!?!?