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How to see your iphone cell signal in numbers or db

See Your iPhone Cell Signal in Numbers or dB

4
STEPS
TOOLS
Tap Phone

Tap Phone

Tap Keypad then type in *3001#12345#* and press call

Tap Keypad then type in *3001#12345#* and press call

Now the bars at the top left have been replaced with a negative set of numbers that are in dB.  The closer to 0 the better the signal, but your phone can work on much higher numbers, aka -100 or more.

Now the bars at the top left have been replaced with a negative set of numbers that are in dB. The closer to 0 the better the signal, but your phone can work on much higher numbers, aka -100 or more.

This feature helped me and AT&T resolve the issue of poor phone call quality in my house. Not useful for anything more than that, but I hope it helps you out like it helped me.

  • 1.0 iPhone