Piper Jaffray's Pipe Report (AAPL, CLWR, T)

Piper Jaffray is out with its Pipe Report this morning, and it covers a few companies, such as Apple AAPL, Clearwire CLWR and AT&T T. In the Pipe Report, Piper Jaffray writes, "While Apple's iPhone has created a loyal, high-ARPU base of customers for AT&T, it also has high acquisition costs/subsidy. Plus, beyond the service contract, the carrier does not get incremental revenues generated in the app store." It also goes on to say, "Sprint and Clearwire launched WiMAX coverage in 3 additional cities: Boston, Daytona Beach and Providence. Clearwire launched Rover, a prepaid 4G mobile broadband service. Unlimited 4G data costs $5 a day, $20 a week or $50 a month."