Cel-Fi Duo For T-Mobile

by Cel-Fi

Easy to install, plug & play technology, power up and Cel-Fi is set.
Cel-Fi Duo For T-Mobile has a rating of 5.0 stars based on 2 reviews.

Retail price: $599.00 You save: $24.00

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Product Description

The Cel-Fi Duo is a fully wireless signal booster that dramatically improves indoor 3G/4G/LTE voice and data for T-Mobile. This system has no external cables or antennas - the Network Unit receives the signal from the mobile network and relays it to the Coverage Unit to amplify your signal. Ideal for residential environments.

The Cel-Fi Duo comes with a 2-Year Warranty.

How it works

how a cell phone booster works
1 - Outdoor antenna

The outdoor antenna receives and transmits signal to nearby cellphone towers. Outdoor antennas can be either directional or omni-directional.

2 - Cellular amplifier

The amplifier (or "repeater") boosts the signal coming to and from and going to the cell phone tower. The "gain" of the amplifier describes how strong the amplification is - you'll see that word scattered across our product pages.

3 - Indoor antenna

The indoor antenna rebroadcasts the signal inside the building. Some kits have more than one indoor antenna to help distribute the signal.


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 6,000 sq. ft. coverage
Medium outdoor signal (3-4 bars) up to 4,000 sq. ft. coverage
Weak outdoor signal (1-2 bars) up to 2,000 sq. ft. coverage


Like almost all of our products, the Cel-Fi Duo For T-Mobile 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 RepeaterStore, 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.


SKU 590N203-001-10
Weight 19.8/13.7 oz
Dimensions 6" x 5.7" x 2.3"
Power supply 12 VDC
Coverage 2000 sq ft (1 coverage with weak signal)
4000 sq ft (2 coverage with medium signal)
6000 sq ft (3 coverage with strong signal)

Customer reviews

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Our signal experts have helped design and install kits in buildings of over 200,000 sq ft. Let us help you find the right product.

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