ROFOMOFO
Active Member
About 80 minutes.
However, the description of the 10gb is pretty vague. Is it just audio/video related to his work activities, or total storage on the iPhone? Regular iPhone use takes up a ton of drive space - the Facebook app can hit half a gig or more, a few hundred songs can tie up another gig or two and even sms/mms/imessages can total a few gigs if he sends/receives a lot of pictures. Could easily be 9gb of innocent activity and a few minutes of bad stuff.
Each text message is 140 bytes therefore 7.67 million text messages per gigabyte.