This IDC Insight gives the gross subscriber numbers for the top 10 wireless carriers in the United States during the first quarter of 2009. It also provides numbers from the first quarter of 2008 as a comparison. A percentage difference is given between the two quarters. Also included is a percentage breakdown of the number of total gross postpaid and prepaid subscribers during the first quarter. This document also includes the total number of retail customers for the first quarter of 2009, broken down by a postpaid and prepaid percentage.