It all depends on your device’s carrier and chipset. Every iPhone can access field test mode, BUT not every iPhone displays dBm readings. Though, there are backup application options, which we will explain soon.įield test mode is the only method that allows most iPhone users to check their dBm. The Apple App Store doesn’t offer apps designed to show live dBm readings. However, things are a little bit more complicated for Apple users. How to Check Cell Signal Strength?Īndroid users can use either method. For those closer to -120 dBm, a signal booster or repeater will help improve your service. The closer you are to -50 dBm, the better your signal. They don’t fluctuate based on carriers or manufacturers. -110 to -120 dBm = very poor signal or a dead zone (0 to 1 bar).ĭBm readings are not subjective.-100 to -109 dBm = poor signal (1 to 2 bars).-90 to -99 dBm = average signal (2 to 3 bars).-80 to -89 dBm = good signal (3 to 4 bars).
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