Alcatel Booster ALC-Cell9961 T-Mobile Personal 4G LTE Cellspot Cell Phone Signal Features : The T-Mobile 4G LTE CellSpot is the first-ever 4G LTE mini-tower available from a U.S. wireless provider. Think of it as your own 4G LTE mini-tower with low power settings for indoor use providing an average 3,000 sq. feet of glorious full-bar T-Mobile LTE coverage throughout your home, small business or virtually anywhere you need it. Advanced technology designed to maximize the coverage area,