Check iPhone Cellular Signal Strength With Field Test App

Apple placed a hidden feature in the iOS, namely the field test app, which takes a special code to activate it, the intention of the code is to inform you about your iPhone's cellular signal strength.

The code I am talking is *3001#12345#* and then press the Call on your mobile phone to launch the field test app!

Your mobile phone cellular signal strength will appear in negative number, the higher the negative number means your signal quality is worse. If you have -97 means it's worse than -75.

You will be presented with a excessive technical information in the field test app report.

Posted in: iPhone