![]() Test cell phone signal on an iPhone iPhone cell phone signal strength appsįor iPhones, there are some helpful apps that you can download to test existing cellular signal strength and network speeds. If you’re not familiar with cell phone signal boosters and how they work, this guide to cell signal boosters offers a helpful explanation on how they make stronger cell connectivity possible. When your cell signal is weaker than -100 dBm, it’s likely that you won’t have service without relying on a cell signal booster. To enjoy optimal functionality on your smartphone or cellular-connected device, you’ll want a signal between -50 dBm and -80 dBm. It becomes more difficult to maintain a wireless data transfer at the -100 dBm range. To make a call, -100 dBm is not ideal but will work. How does cell signal work with my phone?ĭifferent ways you may use your phone require different cell signal strengths. In situations like that, simply convert the number to a negative. In field test mode, some phones may show dBm as a positive number. So, a cell signal that measures -76 dBm is twice as powerful as a cell signal that comes in at -79 dBm. The typical range of measure for cell signal strength is between -110 dBm and -30 dBm.Īnother quirk about dBm measurements is that being a logarithmic unit of measure, each 3-dB increase is actually doubling the power. Excellent signal strength = -64 dBm to -50 dBm.Good signal strength = -65 dBm to -84 dBm.Poor signal strength = -85 dBm to -100 dBm.It’s a bit counter-intuitive, but the closer to zero the dBm reading is, the stronger the cell phone signal. What is a good signal strength for a cell phone? On a signal strength meter, dBm is typically expressed as a negative number-such as -88. Signal strength for cellphones is calculated using decibel milliwatts, or dBm. How to accurately test cell phone signal strengthĭecibels (dB) offer a more accurate and useful measure of cell phone signal strength. However, to make sense of this reading, let’s get an understanding of how you can measure and test cell phone signal strength more reliably. Just like a car’s gas gauge, signal bars can only provide a general idea of signal strength- not an exact measure.Ĭhecking your mobile phone’s actual signal strength is better than relying on bars alone. This means the two signal bars showing on your model of iPhone may actually show that your phone is receiving more signal than your friend’s Android phone, which is currently displaying three signal bars. Some phones assign different values to each bar graphic.
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