Cel-Fi DUO+ Indoor Smart 4G LTE Signal Booster for Verizon or T-Mobile

Cel-Fi DUO+ Indoor Smart Cellular Signal Booster for Verizon or T-Mobile
Model: DUO+
Availability: Discontinued

***DISCONTINUED***  This item is discontinued. No replacement has been assigned. Contact Westward Sales to discuss your options.


Cel-Fi DUO+ Indoor Smart Signal Booster for 4G LTE Networks, Choice of Verizon or T-Mobile → Cel-Fi DUO Plus Smart Signal Booster for Verizon or T-Mobile 4G LTE Networks

Poor signal quality, dropped calls, and reduced data throughput has always been the bane of cellular users. Cel-Fi by Nextivity solves these issues with the easy-to-install DUO+ smart signal booster for Verizon and T-Mobile subscribers. The Cel-Fi DUO+ dramatically improves mobile service issues by eliminating dead zones and dropped calls. It increases voice and data coverage and significantly enhances networking quality for 4G LTE devices. Because the DUO+ is so quick to set up, you’ll immediately experience better LTE signal quality for your phone - a boost from one to five bars is possible. It’s perfect for homes, offices, small businesses, and other indoor spaces.

With a newly patented echo cancellation algorithm, the DUO+ offers the clearest signal levels and data services throughout an indoor coverage area up to 15,000 square feet (1,500 square meters). It’s the highest performing, fully certified, signal booster in its power class. With 100 dB of gain, it reduces your cell phone’s power requirements, extending battery life. The DUO+ does not require the installation of external antennas or cables; nor does it require a sophisticated setup routine by the user. The DUO is self-contained and self-configuring.

The DUO Plus consists of two compact units: a Coverage Unit (CU) and a Network Unit (NU). Simply plug both into a power outlet to instantly improve your cellular signal. The NU senses and captures three LTE bands from the closest cell tower and relays two simultaneously to the CU. The CU then transmits the boosted signal inside the home or business. The units communicate wirelessly over a 5 GHz link. The DUO+ peacefully coexists with other wireless electronics and does not interfere with nearby 2.4 and 5 GHz Wi-Fi, femtocells, and other cellular devices. The total enhanced coverage area equals twice the distance between the NU and the CU. The LED user interface indicates the best span to maximize coverage.


Cel-Fi WAVE is a smartphone app and cloud-based software platform packed with features to help you get the best performance from your Cel-Fi DUO+. The WAVE portal and app includes a dashboard for monitoring signal strength and viewing real-time data and performance metrics. It facilitates registration (if needed), firmware updates, commissioning, installation, optimization, and troubleshooting.

Cel-Fi WAVE app

Glance-able view to the state of your Cel-Fi environment, including the Boost Strength indicator. It features:

Change the default network operator, select the booster technology (3G, 4G), setup an external antenna, configure the antenna position, and more.

Advanced Mode:
Get real-time data and performance metrics for troubleshooting devices.

Booster Updates:
Keep your Cel-Fi Booster up-to-date as new software versions become available.

Register (when required):
Easily activate and register your Cel-Fi Booster.

Key Features

  • Quick 5-minute plug-and-play setup
  • Up to 100 dB gain for voice and data
  • Integrated antennas boost up to three bands of 4G LTE (it does not work with 3G)
  • 1000x stronger signal than bi-directional amplifier (BDA) systems
  • Coverage and capacity up to 15,000 square feet
  • Maximized signal-to-noise (SNR) ratio provides better data rates
  • Remote monitoring and management using the WAVE phone app
  • Network safe – carrier and FCC approved
  • Choice of Verizon or T-Mobile
  • Included in the box are Network Unit, Coverage Unit, 2 power supplies, and 2 mounting Brackets

Cel-Fi Duo Plus Installation


Set up is easy, requiring no tools or special knowledge of cellular networks. First, use your phone to find the best cellular signal. Typically you will get the best signal near a window. Second, place the Network Unit (NU) in the location where you get the best cellular signal. Third, place the Coverage Unit (CU) in the location where you need improved coverage. And finally, use the Cel-Fi WAVE app to finish setup and activation.


DUO+ Configurations for Verizon and T-Mobile

D32-2/4/13, Verizon compatible, boosts bands 2, 4, and 13
D32-2/4/12, T-Mobile compatible, boosts bands 2, 4, and 12

The DUO+ is carrier specific. Order model D32-2/4/13 for Verizon 4G LTE and XLTE to boost download and upload frequencies on bands 2 (1900 MHz), 4 (1700/2100MHz), and 13 (700 MHz). The D32-2/13/66 model boosts band 66 (1700/2100MHz). This band is a superset of band 4 but is not available everywhere. Model D32-2/4/12 for T-Mobile 4G LTE boosts download and upload frequencies on bands 2 (1900 MHz), 4 (1700/2100MHz), and 12 (700 MHz).


Westward Sales is a certified reseller for Cel-Fi's line of cellular boosters and antennas.

CategoryCellular Booster
Cellular Interface
LTE FrequencyBands 2, 4, 12 (T-Mobile) or Bands 2, 4, 13 (Verizon)
CarrierVerizon and T-Mobile
Power Consumption< 15 W per unit
Input VoltageAC / 12 VDC external supplies (two included)
Dimensions158.5 x 146 x 59 mm for each unit
WeightNetwork unit: 560 g, Coverage Unit: 390 g
Operating Temperature0° to 40°C
Humidity5% to 95%, noncondensing
CertificationsFCC Parts: 15, 20, 22, 24, 27; EN 301 893; EN 301 908-1, 11, 15; EN 300-328; EN 62311; UL 62368-1; CSA C22.2#62368-1; IEC/EN 62368-1; 3GPP TS 25.143 Rel.10; 3GPP TS 36.143 Rel.10; EN 50566/62209-2/62479 (SAR); Bluetooth SIG
Download NameFile Size
Cel-Fi DUO+ Datasheet323.84KB
Cel-Fi DUO+ Quick Start Guide2.23MB