Why Cel-Fi Smart Signal Boosters are Customized for Each Carrier


We’re often asked why Cel-Fi smart signal boosters are designed specifically for each carrier’s mobile network. The answer lies in how the spectrum works.

Mobile operators spend billions of dollars on spectrum (this is the radio frequency that your cell phone signal travels over) and want to protect it at all costs. Given that broad-spectrum repeaters can cause a lot of interference and damage, operators have adopted a strict policy against the use of these legacy signal boosters on their own networks.

Let’s look at a worst case scenario. Operator A’s customer is far away from the base station (think of the tall communications towers you see while driving along a highway) and has horrible coverage, so they buy a repeater. Since repeaters are nothing more than massive amplifiers, it will jack up the power to reach all wireless spectrum within range – regardless of the operator. This jacked up signal could blow the front doors off another operator’s tower that’s closer, decreasing their coverage footprint.

This is serious stuff. So much so, mobile network operators actually hire engineers to spend their day driving around assisted by complex, sophisticated test equipment to look for repeaters messing up their networks and shut them down.

The Cel-Fi smart signal booster is like a laser or scalpel that only carves specific operating channels to meet each operator’s requirements (more than 137 mobile network operators worldwide and counting, including AT&T and T-Mobile). In other words, anyone using an operator-authorized booster is allowed to transmit on that licensed spectrum without ruining things for anyone else.

Besides, come March 2014 when the industry clamps down on legacy boosters that cause interference, anyone purchasing one could be stuck with a very expensive doorstop and a hefty fine.

By the Cel-Fi Team

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