How do I test dBm on iPhone?

You can check your iPhone signal strength by using its secret Field Test mode. Open the Phone app and dial *3001#12345#* on the keypad. In a few seconds, you’ll see a mishmash of numbers.

Starting with iOS 11 and 12, Apple has hidden dBm readings in iPhone field test mode.

Accessing Field test mode on Android phones is also straightforward. You simply need to find your way to “Settings” > “About Phone” , and your numerical signal strength will be available under either Network or Status, depending on the model of the phone you own.

Field Test Mode is designed for engineers and cellular operators and most people will not need to use it on a regular basis. You can access Field Test Mode on an ‌iPhone‌ by opening up the Phone app, inputting *3001#12345#* and pressing the phone button . It won’t make a call, but will instead open the Field Test app.27 Tem 2020