Cellphones in a supporting role

http://www.iht.com/bin/printfriendly.php?id=12872415

There are the women in Bangladesh and other countries who invest in a phone and then rent it to fellow villagers, making money for themselves while providing a key service for others. There are the fishermen in India who have increased their earnings by calling from their boats to various ports to see where their catch can get them the most money.

But what about countries with advanced economies? Might cellphones have a nontraditional role there? Could cellphones help young people in the inner cities of San Francisco, Chicago, New York or London deal with fears about sexually transmitted diseases and unwanted pregnancies, for example?