Average U.S. Smartphone Data Usage Up 89% as Cost per MB Goes Down 46%

In 2010 - 2011 Smartphone data usage has almost doubled but most users are paying around what they did a year ago.
The amount the average smartphone user pays per unit of data (MB) fell from 14 cents per megabyte (MB) to a mere 8 cents.

In  the last 12 months, the amount of data the average smartphone user consumes per month has grown by 89 percent from 230 Megabytes (MB) in Q1 2010 to 435 MB in Q1 2011. Data usage for the top 10 percent of smartphone users is up 109 percent while the top 1 percent has grown their usage by 155 percent from 1.8GB in Q1 2010 to over 4.6GB in Q1 2011.

Consumers with iPhones and Android smartphones consume the most data: 582 MBs per month for the average Android owner and 492 MBs for the average iPhone user. Windows Phone 7 users doubled their usage over the past two quarters, perhaps due to growth in the number of applications available. (Nielsen June 2011)