It only matters if your outdoor signal levels are weak. Many people think gain is the most important specification across the board – but it isn't. Gain is measured in decibels, which is abbreviated as 'dB.' Here's why:īooster gain - The 'gain' of a booster is how much it amplifies the signal. That one spec is either 'gain' or 'downlink output power.' How do you know which one? Well, it depends on how strong your outdoor AT&T signal is.

If you look at the user manuals or product literature for any AT&T signal booster, there are a lot of different values shown.īut here's the low-down: there's only one spec that you should pay attention. The Two Signal Booster Specs That Matter:

An indoor antenna that that communicates with the tower.

A signal amplifier that's 'bi-directional' - that means it boosts the signal both the 'uplink' and the 'downlink' paths.

An outdoor antenna that communicates with the tower.

The basic structure is explained in these two graphics:Įvery AT&T signal booster has three main parts: How AT&T Cell Signal Boosters WorkĮvery available AT&T booster works similarly: the signals coming from and being sent to the your nearest AT&T tower are amplified by the booster. The right choice depends on your circumstances: the signal conditions, and whether you plan to use the AT&T booster in your home, office, car, truck, or boat.

Our conclusion was that there's no one single best signal booster out there. It was a laborious process: our team of Signal Experts conducted dozens of tests in both the lab and in all kinds of real-world signal conditions to see exactly which AT&T signal boosters perform the best. Not all AT&T cell signal boosters are the same. In fact, AT&T even used to have their own, the now-discontinued AT&T MicroCell. The are a lot of choices when it comes to signal boosters for AT&T.

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