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7
Installation
Section 1: Booster System Installation
Step 1. Find the Area Outside with the Strongest Signal
Finding Your Strongest Cellular Signal
To send and receive cell phone calls you need to have an adequate cellular signal. This usually
means having to be somewhat close to a cell phone tower. Your cellular signal is measured in
decibels (dB), which represents the power of the signal. Signal readings appear as a negative
number, for example -85 dB. The stronger your signal is the closer it gets to zero. As the
illustration below shows a -50 dB signal reading is very strong while a signal reading of -100
dB and above is very weak.
How to Determine Your dB Signal Reading
• Using an iPhone: Dial *3001#12345#*, a Field Test screen will appear press down on
the home button for a few seconds so your dB reading will appear in the upper left hand
corner.
• Using an Android: Download the “Network Signal Info” within the Google Play store. Once
installed, you will be able to view your dB strength.
• Internet: Go to: www.speedtest.net to test your 3G and 4G data rates.
• Alternatively, you may purchase a SureCall Signal Meter (SC-meter-01)* which detects and
displays the current signal levels.
*
The SureCall Signal Meter may be used to read signal levels to identify the best location for an
antenna, as well as, identify the optimum angle at which to aim a directional outside antenna
when connected to the antenna using a provided cable.
Signal Strength
Excellent
-50 dB
-60 dB
-70 dB
-80 dB
-90 dB
-100 dB
Good
Poor
