A number higher than about -90dBm (like -80 or -70) is a strong signal. Whereas your phone shows bars, wireless industry folks measure signal in -dBm. Cheaper boosters available from Amazon often aren't FCC-certified, which means they can cause trouble with surrounding cell sites and networks.īoosters help the most when you have a weak signal, not when there's none at all. That's why you need to stick with boosters primarily from the big four companies: Cel-Fi, HiBoost, SureCall, and weBoost (we also include one from Wilson for a special use case you can read about below). What Are the Best Cell Phone Booster Brands?īooster manufacturers have to use various tricks to detect the best signal from surrounding towers and then amplify the signal without messing up the carriers' systems. How to Set Up Two-Factor Authenticationīuying Guide: The Best Cell Phone Boosters for 2023.

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