iPhone Field Test Mode - Dial Pad Gif | weBoost

You should now see the field test mode menu. To view your phone’s signal strength in dBms for the nearest cellular tower:

Selecting rsrp0 tells you the strength of the signal you’re receiving from the nearest cell tower. If you choose rsrp1, you’re getting a reading from a further tower. 

If you are using iOS 14 and later, then the hidden field test mode interface has been redesigned. To access field test mode on iOS 14, you follow the same steps listed above. You will then be taken to a dashboard where you can see your LTE dBm reading and other metric data.

Using Field Test Mode on Older Versions of iOS

Follow the instructions above if you’re using an older version of iOS through AT&T or T-Mobile or an iPhone with an Intel chipset.

If you’re using an older version of iOS through Sprint or Verizon, or an iPhone with a Qualcomm chipset, you need to first turn off LTE:

To view your phone’s signal strength in dBms for the nearest cellular tower:

Restarting Field Test Mode

Once you’ve checked your signal strength in field test mode, you may want to compare it to other areas of your home. Your reading will be more accurate if you turn off your cellular connection and restart it before taking additional readings. 

airplane mode - iphone test mode | weBoost

This resets your cellular connection so you can take another measurement in field test mode.

Exiting Field Test Mode on iPhone

When you’re finished measuring your iPhone’s signal strength, you can exit field test mode in two ways.

exit iphone field test mode | weBoost

If you turned off LTE to enter field test mode, make sure to turn it back on again. 

Understanding What the Signal Measurement Means

Now that you’ve measured your cell phone signal strength, let’s talk about what this number means.

optimal signal strength - weBoost

The number you see displayed for the rsrp0 in field test mode is a measurement in decibel milliwatts. It’s a negative number that should fall between -40 and -130. The closer this number is to zero, the stronger the signal, so a signal strength of -60 dBm is stronger than -80 dBm.

There’s another advantage to measuring your signal strength instead of looking at the bars on your phones. A measurement in dBms can tell you how much stronger or weaker your cellular connection is. A 3-dBm increase is effectively doubling your power, so a cellular signal of -72 dBm is twice as powerful as -75 dBm.

What’s an Optimal Signal Strength?

optimal signal strength in dBm | weBoost

Typically, the strongest signal you can obtain on your iPhone is -50 dBm. If you have anything less than -100 dBm, you likely won’t have any service.

Here’s a quick guide to signal strength:  

For full functionality, aim for a signal strength between -50 dBm and -80 dBm. This should provide a reliable connection for calls and data transfer. If your cell strength falls below this range, you might want to consider a cell signal booster in your home to ensure more reliability.

Why Do You Have a Poor Signal?

About 96% of American adults own a cell phone, according to Pew Research. And while so many of us rely on our mobile phones, we can only be connected to each other if our phones have a strong enough cellular signal. Unfortunately, even if you’re near a cell tower, obstacles can get in the way of the radio signals the tower is trying to send to your phone.

Some of these obstacles include:

You may notice a difference in signal strength as soon as you step inside a car or building or move to a different room in your home.

Get a More Reliable Connection With a Cell Signal Booster 

Get a More Reliable Connection With a Cell Signal Booster | weBoost

If the measurements you’ve taken in field test mode show that your iPhone cell signal is falling below the optimal threshold for functionality, consider getting a more reliable connection with a cell signal booster.

As long as there’s an existing cellular signal — even a weak one — you can install a cell signal booster in your home. A cell signal booster kit enhances the signal so you don’t have to worry about dropped calls or delayed text messages.

There are three main components to a cell signal booster kit:

weBoost cell signal boosters work across devices and carriers, ensuring that you have a strong, reliable connection whenever you need it. Browse our full selection of cell signal boosters according to your needs:

 All weBoost signal boosters are FCC compliant, and many include installation. Take a look at the solutions we offer to see which one is the best fit for you. 



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