Last fall, we told you about Apple's iPhone Signal Strength Placebo, an iPhone code that helps diagnose problems connecting to AT&T's 3G network. Dialing *3001#123456#* and pressing "Call" starts a ...
You could access numerous useful iPhone features by typing in a few secret codes on your device. Lots of the codes work whether you have an old or new iPhone and they can let you do things like ...
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