Review on 📶 ANNTLENT Cell Phone Signal Booster: 5-Band Amplifier for Car Auto RV Truck, Compatible with All U.S. Carriers - Verizon, AT&T, Sprint - Boosts 4G LTE 3G 2G Signal by Richard Mangum

This amplifier does not cover all bands used by US carriers, but it can work fairly well on almost all bands and frequencies. I strongly recommend finding the nearest signal tower in advance. Install these to plan ahead and find the perfect spot for the antenna. Remember, if you have nothing (constant 0 bar), don't worry about the amp. They can only improve your reception, they cannot create a new signal. They take the 1 track you have and turn it into 2 or 3 track with no breaks or freezes. Installation is pretty easy as long as there is a good location for the antenna. If you can easily walk into a room and set up an antenna, the rest is pretty easy and straightforward.