According to AdMob's data, smartphone traffic grew 193 percent over the last 12 months, accounting for half the traffic on its network. Feature phones-what most of us think of as a "regular cell phone"-increased traffic 31 percent in the same time frame, but dropped down from 58 to 35 percent of traffic overall.

Traffic from mobile Internet devices, including handheld game consoles, e-readers, and other similar Internet-capable devices, grew a whopping 403 percent, and now accounts for 17 percent of the traffic overall.

See above chart for a comparsion.

source: arstechnica