My iPhone 6 seems to be a bit crappy when it comes to do what you expect a phone to do – that is being able to call someone. The most obvious reason seems to be the antenna being…crappy. I wondered if I could be able to see the signal strength as a number, so as always Google to the rescue. The solution which worked for me was found here Numbers instead of signal dots?
- Dial *3001#12345#* on your iPhone then press Call.
- You’ll now enter Field Test mode. You’ll notice a signal strength indicator on the upper left hand corner of your screen. You can toggle between signal strength bars and a number by simply taping on it
- At this point, press the home button to exit the app or if you would like the feature to be permanent, continue on. Don’t worry, the process is completely reversible.
- Hold down on the Power button until you see the ‘slide to power off’ bar. Do not power off the device
- Press down on the Home button until the app closes and you return to your home screen.
Note
- You can switch between signal as dots or numbers by double clicking on the indicator
- Note that the number is negative, the closer you are to 0, the better, all explained here at Stackoverflow in full details “What is meaning of negative dbm in signal strength.“
