Review in Progress: Cel-Fi Go M by Nextivity (Mobile Cellular Booster)

What makes Cel-Fi boosters different is that they are digital boosters that interact with a cellular network actively, rather than analog boosters like all the previous cellular boosters we have tested.

Cel-Fi describes their technology this way:

"Cel-Fi is the most sophisticated signal booster in the market. It is completely digital and powered by two custom-made system-on-a-chip processors with 38 digital signal processors. Integrated smart antenna technology tirelessly analyzes the indoor environment and automatically adjusts in real time to provide the best coverage and overall value. Cel-Fi ensures optimal cellular coverage – even with only one bar of signal from the mobile operator."

This technology theoretically opens the door for increased gain and indoor coverage, since the booster is actively repeating and recreating the digital signals from the tower - not just amplifying an analog signal along with all the accompanying signal noise.

The Cel-Fi Wave app is required to change carriers, and it lets you monitor how effectively the Cel-Fi booster is performing.

This is why the Cel-Fi Go M is allowed by the FCC to deliver 65dB of gain in the Go M, well above the 50dB max legal limit of conventional mobile boosters.

The booster is controlled by the Cel-Fi Wave app connected via Bluetooth to the booster. The app will show you the carrier and LTE band that you are connected to, the signal strength, and the amount of boost - directly on your iOS or Android device.

There is a downside to all this technological magic however.

Because the Cel-Fi booster is working interactively with the carriers network, it can only be boosting one carrier at a time. For example - if it is in Verizon mode, AT&T devices will not see any benefits at all.

Analog boosters on the other hand work with all carriers at once.

Specifications

  • Gain: 65dB
  • # of Devices Boosted: Many
  • LTE Bands Supported: 12 (17), 13, 5, 4, 2
  • Exterior Antenna:  Magnetic mount with integrated cable.
  • Internal Antenna: Patch antenna with integrated cable
  • Range of Interior Coverage:
  • In Motion Usage: Yes
  • Power:
  • Retail Price: $600

Testing Status: We have been in communication with Nextivity about the development of this product since summer 2016, and received a pre-production unit for evaluation in May 2017.

We performed one extensive round of testing in mid-2017 with this booster head to head against other booster options, and overall we were underwhelmed and sent back a list of concerns.

But the booster was promising enough in many ways - so we held of drawing any definitive conclusions.

Throughout 2017 and into 2018, Nextivity has been addressing our concerns in firmware and via app updates - demonstrating how the Go M is the only booster that can get smarter over time via software updates.

Get the Book

As of early-2018 we have put the Go M back into occasional testing, and our raw field testing results can be found here for our members who want to follow along:

Cellular Signal & Embedded Router Field Testing – IBR900 | MAX-BR1 | Drive Sleek | MIMO Antennas (1st Quarter 2018)

Once we have enough fresh experience with the latest improvements, we will update our review below for members.

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The Rest of this Review is:
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Purchasing Options

This booster is now beginning to show up in various marine and RV focused online retail channels now too.

Related News Articles:

Cel-Fi Go M Ratings
  • Overall Rating (tbd)

Quick Take

The Cel-Fi Go M likely won't be shipping until quarter 2 2017.

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