![]() ![]() The usual range of measurement for cell phone signal strength is between -110 dBm and -60 dBm. Excellent signal strength = - 65 dBm to -50 dBm.Good signal strength = -75 dBm to -84 dBm.Poor signal strength = -115 dBm to -100 dBm.Close to no signal strength or "Dead Zone" = -120 dBm.The closer to 0 the dBm reading is, the stronger the cell phone signal. On a signal strength meter, dBm is typically expressed as a negative number-such as -95. Signal strength for cellphones is calculated using dBm (or decibel milliwatts) as its standard unit of measure. dBm (D ecibel Milliwatts)ĭecibels provide a more accurate and better measure of signal strength. Most Accurate Signal Measurement : Bars vs. However, to make sense of the signal strength reading, let’s get an understanding of how signal strength is measured and how to test cell signal on your mobile phone. Revealing your cell phone’s true signal strength is better than relying on bars alone. Just like a car’s petrol gauge, signal bars can only provide a general indication of signal strength- and is not an exact measure. This means two signal bars showing on your specific model of iPhone may actually mean that your phone is receiving more signals than your friend’s Android phone that’s currently displaying three bars of signal. Most cell phone manufacturers assign different values to each bar you see. The number of bars you see on your phone can vary vastly and depends on the manufacturer and model - And isn’t an accurate representation of your true signal strength. On your cell phone, whether it be an iPhone or an Android phone, these bars are mostly there to serve as a visual indicator of cell signal strength. This might be the easiest way to get an understanding of your current signal strength, but this does not provide the full picture. If I were to ask you about your cell phone’s signal strength the first thing you would probably do is look at the bars on your phone and respond with one of the following: ![]()
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