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A cellphone signal booster that really works

I’ve been trying out a product that’s designed to improve cell service, both data and voice, in the home. It’s called the CEL-FI Duo Signal Booster from Nextivity, a San Diego-based technology company.

I’m using the model designed for T-Mobile cellular phones. A second version is available for AT&T phones. While there are not yet models for Verizon or Sprint, the company produces models that work with 170 carriers around the world…

Written by Phil Baker

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