how to read field test mode iphone


What are the potential risks associated with accessing the field test mode on an iPhone?

How to Read Field Test Mode iPhone: A Comprehensive Guide

If you’re an iPhone user, you might have stumbled upon the term “Field Test Mode”. It’s a mode that provides valuable insights into your phone’s cellular connectivity and performance. One of the key benefits of Field Test Mode is that it shows you the numerical value of your phone’s signal strength, also known as RSSI (Received Signal Strength Indicator) in decibels (dBm).

Here’s how to access Field Test Mode on your iPhone.

Step 1: Go to Your iPhone Dialer

To get started, open your iPhone dialer and type in “*3001#12345#*”. Press the call button immediately, and your phone will enter into Field Test Mode.

Step 2: The Menu

Once you’ve entered Field Test Mode, you’ll see a menu with a bunch of numbers, letters, and symbols. Here’s a breakdown of some of the most important ones.

– LTE: This displays the strength of your LTE signal.

– Rx AGC: This is the received signal strength in the form of an analogue value. A higher number means better signal.

– Serving Cell Info: Here, you can find the cell tower your phone is currently connecting to.

– SIM MCC/MNC: This displays the MCC (Mobile Country Code) and MNC (Mobile Network Code) of the provider your phone is connected to.

Step 3: Understanding the Signal Strength

The signal strength is the most valuable piece of information you can get from Field Test Mode. It’s displayed as a negative number in dBm (decibels relative to 1 milliwatt), with -50 dBm being the best possible value, and anything below -100 dBm indicating a weak signal.

For example, if the number displayed to you is -75 dBm, your signal strength is good enough for most purposes. However, if you’re experiencing dropped calls or slow data, it could indicate that your signal is weaker than you think.

Step 4: Exiting Field Test Mode

To exit Field Test Mode, press the home button or swipe up from the bottom of the screen if your phone has a home button-less design (such as iPhone X/XS/XR/XS Max).

In Conclusion

Field Test Mode is a valuable tool for anyone looking to maximize their iPhone’s cellular performance. By displaying the numerical value of your signal strength, you can get a better idea of how your phone is performing in real-world scenarios. Give it a try the next time you’re having cellular issues, and see if you can improve your reception and data speeds.

Leave a Comment