Our Certified Refurbished cell phone signal boosters shown below are tested and certified to work like new! Enjoy many of the same benefits as purchasing our new cell phone signal booster kits such as free shipping and get a generous one year manufacturer's warranty on all our used or refurbished signal booster kits. All refurbished amplifier kits are complete kits with all parts included in like-new condition. These're open-box and/ or clearance items but they work as new because they are tested to work perfectly so you can enjoy the same great performance at a deep discount. Rest assured, all used or refurb. signal booster kits are backed by our 60 Days Money Back Guarantee plus One Year Manufacturer's warranty.