CEL-FI DUO+ Quick Start Manual Download Page 2

Step 4

Place the Coverage Unit:

Place the 

Coverage Unit

 as far away, 

inside the space, as possible from 

the 

Network Unit

 or where you need 

coverage the most, making sure that you 

have enough distance between the two 

units. After several minutes, the numeric 

display will stop cycling.

If your device is set-up properly, the green icons will appear on the display as 

seen above. It is possible to place the 

Coverage Unit

 too close or too far from the 

Network Unit

. If this happens, a red icon will illuminate indicating that you need to 

move the

 Coverage Unit

 either closer to, or farther away from the 

Network Unit

 

(see below)

.

Step 5

Optimize The Coverage 

Unit Placement:

The number on the front of the 

Coverage Unit 

display indicates the 

quality of the placement. For the best 

service experience, move the 

Coverage 

Unit

 around your home until an 

8 or 

9

 displays. Based on the 

Coverage 

Unit

 number, you may need to move 

farther/closer to the 

Network Unit

.

If you can find a place in your home that gets at least one bar of 4G LTE signal, 

the revolutionary 

Cel-Fi DUO+

 Smart Signal Booster system brings you smoother 

video and surfing, and improved coverage throughout your home. 

Cel-Fi DUO+

 

Smart Signal Booster is a true plug-and-play system that doesn’t require the 

complicated installation of antennas or cables.

Step 1

Find the location with the best coverage:

The  first  step  in  setting-up  your 

Cel-Fi DUO+

 Smart Signal 

Booster  is  to  find  the  location  with  the  best  mobile  network 

signal. Use your phone to identify the area with the best 

signal. Typically, the best service will be near a window in 

the highest floor of your space. 

Make sure a 4G LTE icon 

is displayed on your handset.

Step 2

Plug-in the Network Unit:

Plug the 

Network Unit

 into an easily 

accessible outlet near the area with the 

strongest 4G LTE signal. (Note: the power 

supplies in your kit are identical.) Make sure 

that at least one bar is displayed on the 

signal strength indicator on the front of the 

Network Unit

. If you do not see at least one 

bar, try a different location.

Step 3

Optimize the Network Unit Placement:

The bars on the front of the device indicate the strength of 

the mobile network signal in the area. Moving the 

Network 

Unit

 to a different location may increase the signal, and 

can improve the quality of your service.

NETWORK UNIT

DISPLAY

BETTER 

2-3 bars

BEST 

4-5 bars

OK 

1 bar

Signal Strength

For the best service, move the  

Coverage Unit until an 8 or 9 displays.

COVERAGE UNIT 

DISPLAY

WIRELESS CONNEC

TION

NETWORK UNIT 

DISPLAY

5

BEFORE

 You Begin

OK

Two green icons 

indicate that the 

Coverage Unit

 is 

functioning normally.

TOO CLOSE

A zero on the numeric display 

indicates that the 

Coverage Unit

 

needs to be moved farther away 

from the 

Network Unit

.

TOO FAR

Four red icons & a scrolling display 

indicate that the 

Coverage Unit

 

needs to be moved closer to the 

Network Unit

.

SCROLLING DISPLAY

COVERAGE UNIT

DISPLAY

For additional information about 

Cel-Fi DUO+ Smart Signal Booster

 

Installation go to: 

www.cel-fi.com

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