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Open Box: Cel-Fi PRO for AT&T

by: Cel-Fi

Powerful 3G/4G/LTE signal booster approved and authorized by AT&T.

by: Cel-Fi

Open Box: Cel-Fi PRO for AT&T

Powerful 3G/4G/LTE signal booster approved and authorized by AT&T.

Retail price: $695.00 You save: $69.50

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Carbon neutral deliveries

Product Description

This is an open box item.  The product will contain all original parts and accessories and is in like new condition.  Open Box items may contain superficial scratches that do not affect performance.  All open box units are sold AS IS and can be returned within 30 days from receipt of the product. 

The Cel-Fi PRO is a powerful signal booster system that boosts 3G/4G/LTE voice and data for AT&T. The Cel-Fi PRO offers up to 100 dB of gain and coverage up to 13,000 sq ft.

The Cel-Fi PRO system is incredibly easy to set up. The simple plug and play installation means that anyone can install the device. There are no external cables, antennas, wires, or drills needed. The units simply plug-in to power.

The Cel-Fi PRO has an LCD color interface and is fully self-contained and self-configuring. It supports the Cel-Fi WAVE mobile application.

Cel-Fi WAVE Mobile App

Cel-Fi WAVE is a smartphone app that will help you get the best performance from your Cel-Fi PRO. The WAVE app is available for desktop, iOS, and Android. The app’s dashboard allows you to optimize setup and download software updates.


  • Plug and play installation
  • Attractive, unobtrusive design
  • Integrated antennas
  • End-to-end cellular communication encryption without additional risk of vulnerability
  • Support for the Nextivity WAVE Portal
  • Unlocked: Cell phones do not need to be registered with Cel-Fi PRO to benefit.
  • Does not interfere with nearby Cel-Fi systems
  • LCD User Interface
  • Remote software update capability
  • Mounting brackets included with every unit
  • 2-Year Warranty


The Network Unit (NU) should be placed where the existing cellular signal is best (generally by a window). The Coverage Unit (CU) should be placed in the location you need improved signal. You can optimize coverage by moving the CU. The NU and CU communicate with each other wirelessly to provide the best signal improvement possible. As the distance between the units is increased, the CU adjusts its coverage bubble to provide the ideal amount of coverage.


Mounting brackets and hardware are provided to mount both (or either) the Coverage Unit and the Network Unit. The brackets come equipped with screws and inserts for mounting in standard drywall. The Network Unit has mounting holes on the back. The Coverage Unit has mounting holes on the bottom and on the back. The holes on the bottom of the Coverage Unit can be used for mounting the Coverage Unit to a ceiling.


The coverage area you can expect from any signal booster kit depends on the signal strength outside the building.

Outdoor Signal Estimated coverage area
Strong outdoor signal (5 bars) up to 13,000 sq. ft. coverage
Medium outdoor signal (3-4 bars) up to 8,000 sq. ft. coverage
Weak outdoor signal (1-2 bars) up to 5,000 sq. ft. coverage


Like almost all of our products, the Open Box: Cel-Fi PRO for AT&T can be installed by anyone who feels comfortable doing simple home repairs and running cabling. If you’re not comfortable doing that kind of work, you might consider finding a local electronics installer or asking a friend.

Unlimited free technical support:

Anytime you purchase from Waveform, you get unlimited free technical support from our signal experts. Whether it’s installing a kit or troubleshooting a problem, we’re here. In over 11 years of being in business we’ve helped over 25,000 customers install kits and improve their signal.

Have a question now? Call us from 7am to 5pm PST: 1-800-761-3041.

Product video


Coverage 5000 sq ft (1 coverage with weak signal)
8000 sq ft (2 coverage with medium signal)
13000 sq ft (3 coverage with strong signal)

Customer reviews

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