Thinking about it more...I think texting, especially group texting, was much bigger during the 2008 campaigns than it was during the 2004 campaigns, and for some, rudimentary web browsing. And they did it on the pre-iPhone concept of a smartphone, that we've since thrown out.

What they used to call feature phones back then (which I think are practically discontinued now - most current feature phones would be considered smartphones in 2006) supported texting but it was used less than on the 2006 concept of smartphones.