Recently it seems that tickets to some concerts are only available via a mobile app.
Ironically, Ticketmaster is kind of ok, as they let you access them using the mobile web browser. Some other vendors seem to be only allowing it through their proprietary apps, though (e.g., AXS).
Not only must you have a smartphone, but you must also use the Google or Apple app stores -- it's not like they'll just let you download an .apk from their own website or anything, of course.
I'm almost ready to just say fuck it and give up on all this bullshit, but when it's one of your favorite bands...