【Five-Band Home Cell Phone Booster】 The Atcall 3K cell phone signal booster amplifies band 12/17, band 13, band 5, band 2/25, and band 4/66. For optimal performance, please verify your outdoor signal strength is at least -110dBm before purchase. 【Support All U.S. Carriers】 This booster is compatible with every major U.S. carrier, including Verizon, AT&T,
