This was purchased to improve reception in some marginal areas on BLM land using a Verizon Blackberry for Voice and the Verizon USB760 modem for Data. To be sure the product worked as advertised I did some testing at home before attempting setup in the field. To verify and document, I did RSSI screen prints "before" & "after" implementing the Wilson DT.  I clamped the receiver at the top of a Painter's Extension pole that I purchased at Home Depot that can be extended to about 25', and connected the amplifier and antenna using the supplied coaxial cable to inside my office home office. Without the Wilson DT: RSSI (1xRTT): -88 dBm /  RSSI (1xEVDO): -90 dBm  .................  WITH the Wilson DT: RSSI (1xRTT): -60 dBm / RSSI (1xEVDO): -75 dBm ........ From these tests I know I can get an improvement if I can get any signal at all in the field, so the product does what it's advertised to do.