![]() ![]() Once we crack the code on dBm readings for iPhones, we’ll update as soon as possible. Speed results can be used as a better guide than bars to determine what your signal strength looks like and where you get the best signal. The next best method is performing a speed test around areas inside and outside your home. If you’re unable to find any of these options during your field test mode process, you most likely have an incompatible carrier and chipset. Your dBm is in the upper left-hand corner of the screen.Tap LTE on iOS 11-13, or the Menu Tab on iOS 13-14įor iPhone with Qualcomm chipset (iOS 11 & 12).Tap the Menu Tab on the top right corner.įor iPhone with Intel chipset (iOS 11, iOS 12, iOS 13, and iOS 14).Your dBm may be visible on the dashboard’s RSRP section.Once off, here’s how to access field test mode: However, your iPhone chipset (Intel or Qualcomm) and your carrier (Verizon, AT&T, or T-Mobile) will determine if this method works.īefore getting started, turn off your WiFi connection. Starting with iOS 11 and 12, Apple has hidden dBm readings in the iPhone field test mode. The process will vary depending on your device’s make and model. Most smartphones can measure signal strength in dBm through field test mode. How Do I Check My Phone’s Signal Strength? At -120 dBm or lower, your phone is just a paperweight.Ĭell phone signal boosters can help enhance your signal strength for greater reliability. ![]() Calls drop, texts take long to send, videos buffer, and webpages are slow. Around -100 dBm is where most experience inconsistent service and weak reception. You’ll be able to enjoy uninterrupted calls and fast data speeds. dBm moves on a negative scale, so –100 dBm is much weaker signal than –50 dBm. The closer you are to 0 dBm, the better your signal strength. It may not be true for all carriers as each carrier has their own dBm to bars conversion standard. Please note: This chart depicts an educational but general assumption. If your outside signal ranges from: Signal Strength What’s a Good Signal Strength for a Cell Phone? Understanding how to find and read dBm is much more accurate and reliable than the bars on your phone. 5G, 4G, T-Mobile, Verizon, AT&T, iPhone, Android.everything runs off dBm. This is true for all cellular devices, carriers, and cellular technologies in North America. In other words, a cell signal strength measurement of -97 dBm is twice as powerful as -100 dBm. Being a logarithmic unit, signal strength doubles every three decibels. They are logarithmic and expressed in negative numbers.Ĭellular signal strength ranges from -50 dBm (great signal or full bars) to -120 dBm (very poor signal or a dead zone). ![]() Decibel-milliwatts, or dBm for short, measure the strength of the wave. For Commercial Decibel-Milliwatts: The Most Accurate Way to Test Cell Phone Signal StrengthĬell phone signals are radio waves (AM/FM) operating within certain cellular frequencies. ![]()
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