Included by the author is the Simmons New Media Study released in April 2008 comparing the usage of different mobile functions among consumers in the U.S. While 59% of people who have used a cell phone in the past 30 days have text messaged, and 49% have taken photos, less than 2% have shopped by mobile and less than 5% have used mobile GPS.

Mobile Phone Activity in the Last 30 Days
Phone Activity	% Users Engaged
Text messaging	59%
Downloaded ring tones	17
Taken photos	49
Taken videos	13
Downloaded music	7
Played video games	14
Accessed Internet	19
Accessed GPS position	5
Streamed video	3
E-mailed	20
Shopped	2
Banked	6
Source: Simmons New Media Study, April 2008