With their service, you can listen to SNSD songs download ringtones+photos, recieve updates and check their schedules, and leave comments!
TBH, unless they’re offering some special videos/photos, I don’t really see how this is a perk since the internet is pretty easy to do all of the above. Oh well, maybe the SKT Mobile Services is really awesome and this is just the cherry on top!
Pretty much all the active idol groups of SM will be participating, so that includes Suju, Shinee, and f(x) too.
Here’s a video of our girls getting giddy about this:
CR: sment@youtube and fantasticwondersonline
SNSD Korean 
I don’t get it, is it a phone application?
Uhh, I’m blur
Even in a world where the internet leads in such services, there are people who don’t have access to internet and so that may be where this service is useful?
Offering SNSD already allows for a demand actually~ (lol)