Talk:Austria/@comment-185.39.175.21-20170723155026/@comment-3564598-20170726055755

No information is required; sometimes you have the option of giving your provider the information, and it is sometimes required to make changes to the account (Drei required me to register my name and address at a store before they would let me change tariffs, for instance, but I did not need to provide that information before then, and they accepted my passport as proof of my name and a hotel booking confirmation as my address).