T-Mobile USA isn’t forgetting its low-cost roots. The operator will start selling the Samsung t139 feature phone and its prepaid plans at 6,400 Dollar General stores next month. The handset will be offered with T-Mobile plans including its $50 prepaid rate with unlimited talk, text and web access, with 100 MB of high-speed data before throttling sets in.

Microsoft may be rolling out a tablet, but it isn’t about to start making its own handsets. That’s according to an interview with Windows Phone Marketing Manager Greg Sullivan published in InformationWeek. A number of smartphone manufacturers plan to make devices running Microsoft’s new Windows 8 platform, including Nokia, HTC and Samsung.

SBA Communications Corporation is buying 3,252 cell towers from TowerCo.The towers included in the sale span 47 states in the United States and Puerto Rico.The transaction is valued at $1.45 billion, including $1.2 in cash and 4.6 million shares of SBA stock. The sale is expected to close during the fourth quarter.

Qualcomm has taken the wraps off its Snapdragon software development kit (SDK) for Android ahead of its annual Uplinq developers conference in San Diego. The software gives developers access to Snapdragon features not available through Android’s standard set of application programming interfaces. The SDK will initially support devices with the Snapdragon S48960 processor, with additional chips in line for the future. A preview release of the SDK is now available on Qualcomm’s developer site, with the full version of the software slated for release to device manufacturers and developers in the coming months.

Browser maker Mozilla today launched a version of its popular Firefox mobile browser for Android, which is now available for download in the Google Play store. Mozilla said it aimed for simplicity and speed in the Android version of its browser. Firefox for Android features HMTL5 capabilities, as well as syncing of certain features across mobile and desktop environments.