there is an shop on the airport. In other Country some shope try to rip of customers...

There is a nice Mall next to the Hotel:
https://www.google.com/maps/place/La...abdc0d8c6c5e0e

But beware dont walk on night-time truth the "Stadtpark" !!!
And print the "3" Page out and mark the offer.
Leave the Shop only after the Simcard work! It take <5Min to Activate the Sim.
NO PERSONAL DATA ARE REQUIRE!!!
Told the Shop personal to Active the "Nimm3 Telefonie" offer who include the Min, MB, SMS.

If you see "3", "3AT" on you Phone go to "Mobile.drei.at" -> Smartphone -> Kundenzone
You see how many Min, SMS, MB you have.

APN: drei.at

EDIT: Can i help you with the Public Transport in Vienna?