Cel-Fi GO X 100 dB Smart Signal Booster Highest gain Cel-Fi GO X 100 dB Smart Signal Booster Free lifetime support $579.99 Choose Options Compare sku: G32-2/4/5/12/13X Cel-Fi GO X 100 dB Smart Signal Booster Most powerful home booster available—up to 100 dB gain Works with Verizon 4G, AT&T 4G/3G, and T‑Mobile 4G/3G Improves signal for multiple phones using the same carrier Purchase just the booster or a complete kit with 1 to 4 inside antennas Outside Signal Strength Coverage @ 700 MHz LTE Strong (−80 dBm, 4–5 bars) Up to 30,000 ft² Fair (−90 dBm, 2–3 bars) Up to 15,000 ft² Weak (−100 dBm, 1 bar) Up to 3,000 ft²
