T-Mobile has been putting the heat on rivals, including prepaid carrier Leap WirelessAT&T is preparing to close its planned acquisition of Leap within a matter of weeks, even though it has been bleeding customers in part due to T-Mobile's aggression in prepaid markets. The deal comes at just the right time for Leap investors, and AT&T could actually make it work since it will enjoy key strategic gains in spectrum and prepaid branding. Ma Bell is able to address Cricket customers' biggest complaint.

In this week's Tech Teardown, host Erin Kennedy and Motley Fool tech and telecom bureau chief Evan Niu break down the biggest stories in tech for investors this week. They look at AT&T's upcoming acquisition of Leap Wireless, two stories facing Facebook this week, Twitter's trend of declining ad prices, BlackBerry's struggles to monetize its BBM messenger service, and Microsoft's new low-cost version of Windows.