We live in a rural area in a mobile home and can get a signal standing out in the pasture on one leg holding our mouth just right... LOL  In the house, we would often have no signal at all or we would have to have our ear to the window facing south to be able to talk and then we still had a lot of static and cutting out.  Once we installed this, the signal inside went to -61 (-60 is supposed to be near perfect, or so I've read online) and my phone has a max of 4 bars and it is sitting at either 3 or all 4 most of the time now in most every room of the house.  Even with an ice storm the last couple of days with high winds, we still have our signal!  YIPPEE!  I would highly recommend this booster!