Advertising for SMS and MMS text-messaging, mobile instant messaging and mobile e-mail will account for more than $14 billion of the $19 billion total expected in 2012; this is up from $2.5 billion in 2007, according to eMarketer, Media Post reported.

The expansion of display and search advertising on mobile phones worldwide is expected to reach just $1.2 billion and $3.7 billion, respectively, by 2012, due to the slow development of high-speed mobile networks.

“Some of the economics of mobile broadband and ease-of-use are slowly coming together. It’s going to take a little longer than people will like, but it will come,” said John du Pre Gauntt, senior analyst at eMarketer, according to Media Post.

However, the emerging mobile industry still needs a “killer app,” to push mobile media ahead. This likely would include some kind of a social element, “such as a location-based dimension because that's a unique part of mobile, du Pre Gauntt told Media Post.

According to a September 2007 AdMob and M:Metrics study, cited by eMarketer, 72.4 percent of the worldwide mobile Internet advertising audience is below the age of 35. In 2007, the standard cost for a mobile marketing campaign more than tripled to $100,00.