In This Update
　　Executive Summary
　　　　o Spending on Wireless Services
　　　　o “Invisible” Spending on Business Wireless
　　　　o Mobile Business Revenue is the Majority of Wireless Spending
　　　　o Profitability Implications
　　　　o Implications for Wireless Operators in the US

List of Tables
　　Table 1. Average Cost per Minute of Airtime for Corporate-Liable and Individual-Liable Respondents
　　Table 2. Quantity of Subscribers and Revenue Associated With US Business User Segments
　　Table 3. Monthly Cost per Subscriber Among Publicly Traded US Operators
　　Table 4. Contribution Margins from Business User and Pure Consumer Categories
　　Table 5. Comparison of Subscriber Numbers and Contribution Margin Percentages
　　Table 6. Comparison of Subscriber Numbers and Contribution Margin Percentages With More Conservative Assumptions

List of Figures
　　Figure 1. Wireline and Wireless Telecom Spending by US Organizations in 2006 (US$ in Billions)
　　Figure 2. Growth Projections for US Corporate Spending on Wireline and Wireless Spending from 2006 to 2011 (US$ in Billions)
　　Figure 3. The Reimbursement Methods Used by US Employers for Wireless Services
　　Figure 4. Wireline and Wireless Telecom Spending for US Businesses, Including Expensed Wireless Bills (US$ in Billions)
　　Figure 5. Wireless Billing and Reimbursement Method by US Businesses by Size of Business
　　Figure 6. Value of Direct and “Invisible” Telecommunications Expenses Used by US Business in 2006 (US$ in Billions)
　　Figure 7. Business and Consumer Share of US Wireless Telecom Revenue (US$ in Billions)
　　Figure 8. Source of Current Wireless Phone Among US Respondents
　　Figure 9. Source of US Wireless Industry’s Contribution Margin in 2006
　　Figure 10. Minutes of Use for Corporate-Liable and Individual-Liable Respondents