Use and Care Manual

SureCall | 48346 Milmont Drive, Fremont CA 94538 | 1-888-365-6283 | [e-mail]
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Installing Your Hardware
Step 1. Find the area with the Strongest Signal
Before installing the outside antenna, nd the area with a strong cellular signal source
from your service provider by following the directions below.
Measure the strength of the existing cellular signal in various locations.
• Apple iPhones: Dial *3001#12345#* and press Call. In the top-left corner, a dB number appears instead of bars.
• Android devices: download apps such as “Network Signal Info” in the Google Play store to measure signal
strength. Search check real signal strength to nd other cell signal measurement apps.
• Internet: go to www.speedtest.net to test 3G and 4G data rates.
The signal booster requires a minimum cellular signal of low –100 dBm. Signal read-
ings usually appear as a negative number (for example, -85). It is recommended that the
signal be between -70dB to -90dB. That’s when the signal is neither too strong nor too
weak. Signals stronger than -50dB may cause the aected bands to shut down while
displaying a ashing red LED (see the graph below). If your outside signal is too weak
(-95dB or worse) you may need a Yagi antenna instead of an omnidirectional one, which
can be aimed at the cell tower of your carrier to pull in a stronger signal to the booster.
Note: Where you install your outside antenna in relation to the carrier’s cell phone tower also determines signal strength. Although cell phone
carriers try to place towers for maximum coverage, local ordinances and terrain features can restrict tower locations, which can limit signal
strength at your location.
Cell
Tower
Outside
Antenna
Signal Strength
-50dB -60dB -70dB -80dB -90dB -100dB
-110dB
ExcellentGoodPoor
SureCall | 48346 Milmont Drive, Fremont CA 94538 | 1-888-365-6283 | [e-mail]
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