Chose your mobile and mobile data plan.
Top row: minutes
Bottom row: gigabytes
Button at the bottom: "Chose for me"
It takes up to a minute to scroll from 500 to 400. Really, this needs no comments.
A few years back there was a competition of sorts for the "worst way to enter a phone number". Looks like Yota's designers looked at it and said, "what a great way to design a dark pattern". See for yourself: imgur.com/gallery/r102w
Many thanks to @pier for sending this gem.