iOS Tip: Access a hidden test app on your iPhone

Apple has a hidden feature to all iPhones that tests the quality of your cell phone‘s single strength.

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To get it, do the following:

1.  Go in to the telephone section.
2.  Bring up the dial pad.
3.  Dial: *3001#12345#*
4.  Press the “Call” Button.

The normal single bar will be replaced by a negative number.  The higher the number, the worse the single is.  For example, a -100 is worse then a -86.  If you tap the number, you can toggle between the number and the standard single bars.

You will also get a table view full of optional commands.   To keep this article simple, I won’t go into what these options are – that’s for you to go exploring 🙂

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Dan Uff

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