Has anyone had expierence with signal boosters/repeaters for cell phones ? Most of the year we get one bar while in the house and they work ok but this time of the year when the snow gets a crust on it's hit and miss whether they will work or not. Wondering what others have tried , I see some as simple as a $2 adhesive sticker that you put on the phone and others priced all the way up to 1K.