I live on the side of a mountain in a remote part of N. Idaho. If I walk 100 feet to the south up a hill, I get maybe 2 bars. Inside my house built with 2x6 and thick insulation..nothing. Verizon's amplifier they sent us didn't do squat as it uses your Satellite bandwidth. Being skeptical this would work, I ordered it anyway and crossed my fingers. How surprised I was that my iPhone went from -140 to -82 dBms! I can talk, text, download and do anything on my cell phone now! My huband's flip phone has a hard time connecting as the case is super thick, but he can still get calls and texts as long as the phone is within 15 feet of the indoor antenna. Installation was a little tricky; finding a spot that the outside antenna would pick up the southern cell tower in our area. 5 feet in the wrong direction, and we got nothing, but once we found the sweet spot, it was working great! Cell reception is going to vary by location and signal strength, so if you installed this correctly and you get nothing, it is not the product...you are truly in a dead zone. TOTALLY WORTH THE COST! If I ever have to sell my house...I can see this adding value to it. Potential buyers want a good cell signal and this delivers! LOVE it! I'm going to buy the booster for my truck next. With an hour drive to town and no reception for 80% of the trip, it's aggravating to miss calls or try to find a location, etc. Since the 4G-x works so well for my house, I have no doubt the vehicle booster will work.