Cel-Fi by Nextivity PRO Smart Signal Booster for AT&T, Refurbished

IN STOCK. Ships same or next business day.
In Stock: Ships same or next business day
(NOTE: is not eligible for promo coupons or discounts.)
  • Boosts 3G & 4G LTE indoors
  • Coverage up to 13,000 sq. ft.
  • Works for all phones on AT&T
  • Complete kit, easy install
  • No monthly fees, no wifi needed
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Cel-Fi by Nextivity PRO Smart Signal Booster for AT&T, Refurbished

Cel-Fi PRO Smart Signal Booster Details

The Cel-Fi PRO Smart Signal Booster for AT&T (Certified Refurbished) by Nextivity is part of the next generation of intelligent signal boosters. All Cel-Fi products are designed and developed using the most advanced radio frequency and signal processing technology.

It greatly enhances 4G, LTE, and 3G cell service for all your wireless devices (smartphones, notebooks, hotspots, etc.) on AT&T for any home or office up to 13,000 sq ft.

The Cel-Fi PRO has several ad vantages over traditional signal boosters:

  • Plug and play setup: just plug in the Network and Coverage units and get better signal.
  • Monitor performance with the Cel-Fi WAVE app.
  • Extreme power good for everything from apartments to large homes.

Unlike multi-carrier signal boosters with a limit of +70 dB, Cel-Fi’s single-carrier solution can boost signal up to +100 dB. That’s a difference of +30 dB or up to 1000x more power compared to multi-carrier boosters.

Eliminate dropped calls, slow data, and poor AT&T signal from your life with a Cel-Fi PRO Smart signal booster.

For Verizon and T-Mobile coverage, check out the Cel-Fi DUO.

All certified refurbished products have been reviewed and recertified by the manufacturer. Same great performance, much lower price.

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Works for all phones & cellular devices, AT&T networks only.
  • 4G coverage up to 13,000 sq ft.
  • Easy plug-and-play indoor setup.
  • +100 dB gain with no cable runs needed.
  • Boosts AT&T signal only.

Cel-Fi Wave App

cel fi app

Cel-Fi WAVE is the software application and cloud-based portal solution used for registering, setting-up, optimizing, remotely monitoring, and updating the Cel-Fi hardware. Available on iOS, Android, Tencent, PC, and Mac devices.

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Who is this for?

The Cel-Fi PRO Smart cell phone signal booster is for:

  • Those who have large apartments.
  • Those in rural areas who struggle with AT&T signal.
  • Anyone with a large home, office, warehouse, or other building who wants better, more reliable AT&T signal.

Compatible With AT&T Networks

The Nextivity Cel-Fi PRO Smart Signal Booster amplifies talk & text, 3G, and 4G LTE for AT&T

Compatible Carriers (4G LTE & 3G): AT&T

Kit Includes:

Cel-Fi PRO Network Unit Amplifier
Cel-Fi PRO Coverage Unit Amplifier
Power Supplies
Mounting Brackets
Screws & Drywall Anchors

Tech Specs

Nextivity Cel-Fi PRO Smart Signal Booster
Model P34-2/4/5/12
Frequency Band 12, 729-746 & 699-716 MHz; Band 5, 869-894 & 824-849 MHz; Band 4, 2110-2155 & 1710-1755 MHz; Band 2, 1930-1990 & 1850-1910 MHz
Max Gain 100 decibels (dB)
Power 110-240 V AC, 47-63 Hz, 12 V DC
Dimensions Network Unit 7.04 x 6.1 x 4.33 in / 17.9 x 15.5 x 11 cm
Dimensions Coverage Unit 6.3 x 6.45 x 3.11 in / 16 x 16.4 x 7.9 cm
Weight Network Unit 1.2 lbs / 0.54 kgs
Weight Coverage Unit 0.99 lbs / 0.45 kgs


This is a CONSUMER device. BEFORE USE, you MUST REGISTER THIS DEVICE with your wireless provider and have your provider's consent. Most wireless providers consent to the use of signal boosters. Some providers may not consent to the use of this device on their network. If you are unsure, contact your provider. You MUST operate this device with approved antennas and cables as specified by the manufacturer. Antennas MUST be installed at least 20 cm (8 inches) from any person. You MUST cease operating this device immediately if requested by FCC or a licensed wireless service provider.


Installing the Cel-Fi PRO is remarkably easy.

  1. Set up the Network Unit near a window with the strongest AT&T signal and plug it into an outlet.
  2. Set up the Coverage Unit where desired, preferably as far away from the Network Unit as possible to avoid oscillation. Plug it into an outlet.
  3. Download the Cel-Fi WAVE app to register and set up your booster.
  4. Enjoy your boosted signal!

The Nextivity Cel-Fi PRO is easy to install. Everything is included in the kit. Our trained product specialists can also assist if you have any questions. Call 1-800-470-6777 or email sales@signalboosters.com.

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