The article doesn't mention the elephant in the room - iPhone. The fall of ringtones and the rise of iPhone isn't a mere coincidence. The feature phones had too little features, everything on them was controlled by the provider, and thus ringtones were something noticeable, one of the few available ways for customization, a way for that brick to do something else. With introduction of iPhone the ring customization - just use any sound file, etc, no payment - became just a very small insignificant feature drowned by a lot of other functionality like full featured web browsing, etc. and thus it lost user's attention. I don't remember anybody doing ring customization on iPhone or any other smartphone besides picking from the preloaded list of rings.