Cel-Fi DUO+ Smart Signal Booster

IN STOCK. Ships same or next business day.
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  • CelFi Duo Right
  • Cel-Fi DUO+ Smart Signal Booster
  • Cel-Fi DUO+ Smart Signal Booster
  • Cel-Fi DUO+ Smart Signal Booster
IN STOCK. Ships same or next business day.
  • Coverage up to 15,000 sq. ft.
  • Boosts 3G & 4G LTE indoors
  • Works for all phones on T-Mobile
  • Complete kit, easy install
  • No monthly fees, no wifi needed
FREE shipping with Expedited available.
Test it for 30 days, or your money back.
2 year manufacturer's warranty
Cel-Fi DUO+ Smart Signal Booster

About This Product

No more dropped calls, slow internet, & disrupted service

The Cel-Fi Duo+ Smart Signal Booster for Verizon or T-Mobile by Nextivity is part of the next generation of intelligent signal boosters. Because all Cel-Fi products are designed and developed using the most advanced radio frequency and signal processing technology.

With up to +100 dB gain of amplification, it greatly enhances 3G & 4G LTE cell service for all your wireless devices (smartphones, notebooks, hotspots, etc.) on Verizon or T-Mobile for any home or office up to 15,000 sq ft. This two-piece wireless system features the Network Unit (NU) and Coverage Unit (CU). The NU pulls in signal and the CU broadcasts the amplified signal throughout the home. No wires and easy set-up.

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.

Never drop a call again. Stop waiting for loading screens. No more searching for reception. Get faster internet & updates on your apps. Send emails and text messages with zero delay. Stream video & audio with little to no buffering.

More bars instantly.

  • Boosts 3G & 4G LTE for any home or office up to 15,000 sq. ft.
  • Works for all phones & cellular devices, Verizon or T-Mobile only.
  • Complete kit: all parts included, easy install.
  • No monthly fees, no need to be connected to wifi, it just works.
  • Industry-leading design & performance by Nextivity Cel-Fi.

Cel-Fi Wave 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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2 (Two) Year Manufacturer Warranty
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Who is this for?

Great for: large home & office, small building, warehouse, and buildings with open spaces up to 15,000 sq ft.

Simple plug & play, no messy installations such as running cable, drilling, and mounting antennas.

Compatible With T-Mobile

The Nextivity Cel-Fi Duo+ Smart Signal Booster amplifies talk & text, 3G, and 4G LTE for Verizon or T-Mobile.

Compatible Carriers (4G LTE & 3G): T-Mobile

Kit Includes:

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

Tech Specs

Nextivity Cel-Fi Duo+ Smart Signal Booster
Model D32-2/4/12
Frequency Band 12, 700 MHz; Band 4/66, 1700/2100 MHz (AWS); Band 2,1900 MHz
Max Gain 100 decibels (dB)
Power 100-240 V AC, 47-63 Hz, 12 V DC
Dimensions Network Unit 6.24 x 5.75 x 2.32 in / 15.85 x 14.6 x 5.9 cm
Dimensions Coverage Unit 6.24 x 5.75 x 2.32 in / 15.85 x 14.6 x 5.9 cm
Weight Network Unit 1.23 lbs / 0.56 kgs
Weight Coverage Unit 0.86 lbs / 0.39 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.


The Nextivity Cel-Fi Duo+ 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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