I have cell service with Verizon, a tower about 5 miles away. Our house is in in a lower elevation area of the county, nothing major 20-30 feet or so. No hills or mountains around. I have somewhat good coverage outside my house, we sometimes drop calls but mostly communication is ok outside. I purchased a repeater (850 MHz, this is compatible with Verizon)) with a yagi antennae, I mounted it on the roof on a 15 foot pole but have no difference in indoor reception. Is it absolutely critical the antennae is pointed in exactly the direction of the tower? I know the general direction and it is pointed that way but I may be off by30 degrees or so. Also, will trees affect this or is it line of sight? I may be able to raise it another 5-10 feet but that will not raise it above the tree line. Is there any hope for me to make a cell call inside my house?