How to install a Cell Phone Signal Boosters in a Home or Small Office Home Office (SOHO). Cel-Fi is a smart signal booster designed to eliminate in-building dead zones and improve indoor mobile phone reception for 3G and 4G voice and data. In the following, we are showing the differences between installing a Cel-Fi signal booster and a traditional conventional analog booster, such as a Wilson or zBoost booster. First, it is important to note the main difference in approach. Cel-Fi is an all-digital booster, the first of the next generation of signal boosters. The Window Unit captures the signal from the operator, and transmits over a high-speed wireless network this signal to the coverage unit, who rebroadcast in full strength in your home or office. A traditional conventional analog booster, such as a Wilson or zBoost booster, always needs an outdoor antenna, connected to an amplifier (a box the size of an Internet Wi-Fi router). Therefore, you need to first find the best location for the outdoor antenna (usually on the rooftop). Once you connect the antenna to the amplifier, you need to connect the amplifier to another indoor antenna, that you would typically locate in the area where you need coverage.

1. Installations of Cel-Fi
in a Home or Small Office
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2. Cel-Fi consists of two wireless devices that work together to increase 3G and 4G
mobile broadband connectivity
• The Window Unit receives the signal from the mobile phone network (even if only 1
bar of signal is available) and relays it to the Coverage Unit.
• The Coverage Unit converts the signal from the Window Unit and amplifies it
throughout the building.
Window Unit and Coverage Unit
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Window Unit
(WU)
Coverage Unit
(CU)

3. 4G 3G
2G
2G
Note: 2G signals are not candidates
4G
2G
2G
Placement of the Window Unit
3
Step 1: in your home or office, Use a 3G or 4G handset to find the
best 3G or 4G (HSPA+) signal location for the Window Unit
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4. Nextivity Confidential
Step 2: Plug in the Window Unit and observe signal “Bars”
• 1 Bar is enough, but more is better
• Cel-Fi setup must be complete for the Window Unit “bars” to be accurate
• The number of Window Unit bars may vary throughout the day
Window Unit Display
Placement of the Window Unit
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5. Note the lower coverage number (5). The
transmission power will always be scaled to
prevent feedback at Window Unit – ensuring best
coverage.
Step 3: Place the Coverage Unit where coverage is needed and observe the
displayed number (0-9, 9 = more gain).
New Coverage
Coverage Unit Display
Placement of the Coverage Unit
5

6. More Coverage
Coverage Unit Display
Note the Higher coverage number (8). The transmission
power has increased, due to a better Window Unit –
Coverage Unit separation
Placement of the Coverage Unit
6
Coverage Unit Display
Step 4: Move the Coverage Unit if it results in better coverage

7. Coverage Unit Display
You should now have 3G (WCDMA) or 4G (HSPA+) coverage in most areas of the home. This
signal level will decrease as you move further from the Coverage Unit.
4G
4G
4G
Step 5: Check Coverage in your home
Check coverage!
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8. For more information - Installation Video
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9. Cel-FI:
www.Cel-Fi.com
Corporate Website:
www.nextivityinc.com
Facebook:
http://www.facebook.com/5bars
Follow Us On Twitter:
http://twitter.com/5bars
U.S. Headquarters: Cel-Fi, by Nextivity Inc.
12230 World Trade Drive, Suite 250
San Diego, CA 92128, USA
+1 858.485.9442 tel
+1 858.485.9445 fax
Steve Van Skike, Sr. Tech Support Mgr.
svanskike@cel-fi.com
support@cel-fi.com
Question about Cel-Fi, or just say Hi?
hello@cel-fi.com
Information & Support
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