Improved Voice Coverage: Enables clear and reliable 3G voice connections within the coverage area - usually up to 1235 m2 (13??000 Sq. Ft.).</br>Ease of Installation: Cel-Fi is a true "lug and Play" system that doesn't require the installation of external antennas bulky coaxial cables or a configuration set-up by the subscriber.</br>Improved Data Throughput: For indoor areas with poor reception Cel-Fi offers significant data throughput improvements - often in excess of four times the current rate!</br>Improved Battery Life: Cel-Fi manages the power levels between the cell tower and user devices so that subscriber devices enjoy significant improvements in battery life</br>ONLY compatible with T-mobile service. Will not work with any other cellular service not compatible with Sprint nor Verizon nor AT&T</br></br>Product Description</br></br>Nextivity's second generation CelFi RS-2 is a cost- effective and intelligent Indoor Coverage Solution for WCDMA/HSPA+ designed to dramatically increase indoor voice quality and data throughput for 3G consumers while significantly improving network capacity for Mobile Operators Small Businesses and MVNOs. ONLY compatible with T-mobile this device is NOT compatible with Sprint nor Verizon nor AT&T. Breakthrough patented technology enables a wireless?? indoor?? plug-and-play?? user installable coverage solution that's so notouch easy to use it obviates the need for support calls to the Operator's Help