QUMI: Press Release April 10, 2012, 8:00 a.m. EDT Quamtel's Subsidiary, DataJack, Expands Mobile Virtual Network Operator (MVNO) Services With Sprint. Under a multi-year agreement with Sprint, DataJack Inc. operatesas a Mobile Virtual Network Operator (MVNO) offering prepaidnationwide 3G mobile broadband service. Recent enhancements toDataJack's proprietary business and operational support systems,coupled with the Sprint 3GNetwork that reaches more than 282million people (including roaming), allows DataJack to capitalizeon near real-time usage control, greatly improving the margins onits prepaid data plans and opening up additional channels forgenerating revenue.