Search query: cell phone signal booster without outdoor antenna

Product: Amazboost Cell Phone Booster for Home -Up to 2,500 sq ft,Cell Phone Signal Booster Kit,All U.S. Carriers -Verizon,AT&T, T-Mobile, Sprint & More-5G 4G 3G 2G LTE FCC Approved, s2
Brand: Amazboost
Relevance: Substitute
Compatible with all US carriers：band12, 13,17,5,25,2,4, including: AT&T, Verizon, T-Mobile, Sprint, U. S. Cellular, etc. 3G 4G 5G Compatible;
Boosts voice and data signal. Suitable for metal roofs on home, office, shop, building, warehouse, etc. Enhances the signal up to 100X, with a coverage area of 2500 sq. ft. and up. (Note: coverage area range depends on the outdoor signal level: 1-2 bars (-100dBm) ~400 sq. Ft. , 3-4 bars (-90dBm) ~1300 sq. Ft. , 5 bars (-80dBm) ~2500 sq. Ft. )
Multi -user simultaneous connectivity: smart phones, tablets, modems, Wi-Fi hotspots can all directly connect at the same time
FCC Approved. FCC authentication certificate ID:A7V-SR75702001,HVIN:TRUE5-D.ISED Approved,IC Certification: The booster is compliance with the requirements of the standards applied.IC certification number: 10198A-SR75702001.Automatically adjusts system gain and power level to get the optimum result. No manual intervention needed. Easy setup. Complete installation can be done in half an hour by one person
With a better incoming signal, cell phones require less output power to send and receive a signal. This can significantly reduce the required transmission power of mobile phones and therefore reduce the level of electromagnetic radiation exposure to the human body. At the same time, having a better signal reduces power usage, which saves your battery and can and improve battery life of phones on standby mode by up to an additional 2 hours