Originally Posted by
flyingfkb
7 day and monthly passed can not be bought via the app. You can buy them only at ticket machines or in small newspaper shops (normally they have sticker saying "BVG tickets sold here"). Just buy the 7 day pass on arrival. There is absolutely no need to buy them now. The newer ticket machines even take credit cards (with chip and pin) and some are even upgraded to contact less.
Thanks, is there a ticket machine at TXL?