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Best Smartphone Apps to Find Your Mobile Signal Strength

on 8th Oct 2018

Are there apps to boost my cellular reception?

We've already covered finding your nearest cell phone tower. Now you want to know: Are there any cell phone apps that can boost my signal strength?

Sadly, the answer is no.

However, there are legitimate smartphone apps that can tell you exactly how poor your signal is and even the nearest cell tower locations. 

First, a little lesson.

The Truth About Cell Phone Bars

They're subjective across all carriers and networks.

One bar on T-Mobile might be three bars on Verizon, which might be two bars on Sprint, which might be full bars on AT&T - despite having the EXACT same signal and performing at the EXACT same speeds. Whether you are 3G or 4G LTE makes no difference, either.

There's no standard. Each carrier or phone manufacturer can determine what one, two, three, or full bars represent for their service or device. So who's telling the truth? Or - here's a better question for you - do you trust them?

Fortunately, there's a better way to measure your cell phone signal and that's by looking at decibel gain.

Cell phone signals are measured in dB (decibels). They're AM/FM radio waves, the kind that are great at traveling long distances but are easily interrupted and lead to spotty service. That's when a cell phone signal booster comes in handy.

 All cellular devices operate within this standard:-50 dB to -120 dB frequency.

-50 dB is considered full strength (full bars). -120 dB is considered a dead zone (no service).

dB readings are not subjective. All cell phone signals in the US and Canada need to operate within this range to work. The closer you are to -50 dB, the better your signal. The closer to -120 dB, the worse your signal. Many smartphones have the ability to display dB readings.

Recommended Cell Phone Apps to Find Signal Strength for iPhone:

Unfortunately, recent models of iPhone have removed the ability to read dB levels. Therefore, there is no perfectly accurate way to read your dB level. The best app we have found for this purpose is the SpeedTest app by Ookla (picture). However, this only measures data rates and may not represent the best results.

How to Find an Accurate dB Reading on your iPhone:

IMPORTANT: There are two set of instructions for iPhone users. Starting with iOS 11, Apple has hidden the ability to view dB signal. However, depending on your iPhone chipset & carrier you should have a 25% chance to view your dBm (more info below).

  1. Go into Phone Mode

    How to access db cell signal on iPhone, Step 1
  2. Dial and Call *3001#12345#*

    How to access db cell signal on iPhone, Step 2
  3. You'll enter Field Test Mode

    How to access db cell signal on iPhone, Step 3
  4. Drag down your notifications bar and you will see your dB reading in the left-hand corner.

    How to access db cell signal on iPhone, Step 4

Video (will not work with iOS 11 or above):


Recommended Cell Phone Apps to Find Signal Strength for Android:

There are several excellent apps available to measure your cell phone's signal strength for Android. The two we recommend most highly are LTE Discovery and Network Cell Info Lite. These apps are used even by professional cell phone signal booster installers, all of whom we've talked to swear by them.

How to Find an Accurate dB Reading on your Android:

If downloading an app seems like too much trouble, there's another easy way to pull up your dB reading using just the hardware built into your Android. Follow these steps:

  1. Access Settings

    How to access db cell signal on Android phones, Step 1
  2. Then General

    How to access db cell signal on Android phones, Step 2
  3. Go to About Phone

    How to access db cell signal on Android phones, Step 3
  4. Network or Status

    How to access db cell signal on Android phones, Step 4
  5. You should see your dB Value

    How to access db cell signal on Android phones, Step 5

Video:

Now you understand how to read and find dB values on your phone. Walk around the house and find that place to get better signal.

Once you have a dB reading, then you know just how good, average, or bad your signal strength is. -50 dB to - 79 dB is very good signal. -80 dB to - 99 dB is an average signal. -100 dB to -120 dB is below average or poor signal.

And if you walk around the perimeter of your house, you can generally tell the location of your cell tower because your dB reading will dip towards -50 dB. How's that for two birds and one stone?

For more reading, check out our guide on finding cell towers and for people suffering from poor signal, our ultimate guide on cell phone signal boosters is a great place to start.


Want to learn more about cell phone boosters? Read more with our definitive guide:


How We Can Help:

Wilson Amplifiers is the leading provider of cell phone signal boosters. They amplify 3G & 4G LTE for any phone with any carrier for home, office, or vehicle.

  • Free consultation (ask us anything) with our US-based customer support (sales@wilsonamplifiers.com).
  • Free shipping.
  • Better signal or money-back guaranteed.

We want everyone to be satisfied, so we provide lifetime technical support and a 2-year warranty.

Read real reviews from our customers.

Ask us anything and we'll be glad to help.

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