How Strong Is Your iPhone Signal? Find Out Now! [No Jailbreak Required]

This Awesome tip creates a decibel reading in the top left of your iPhone screen where your signal bars used to be.

Step 1: Dial *3001#12345#* on your iPhone then press Call.

Step 2: You’ll now enter Field Test mode. You’ll notice a signal strength indicator on the upper left hand corner of your screen.

Step 3: Hold down on the Power button until you see the ‘slide to power off’ bar.  Do not power off the device.

Step 4: Press down on the Home button until the app closes and you return to your home screen.

Your done!

To return to the default bars permanently, follow these steps:

Step 1: Dial *3001#12345#* on your iPhone then press Call.

Step 2: Press on your Home Button once.

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