Ever pick up the phone, hear a voice, and get that sinking feeling: "This can't be real... can it?" That unsettling doubt is what David from Los Angeles felt, as did many others when they got a ring ...

There's a hidden language that's part of the GSM standard that can unlock hidden features on your smartphone. You can dial codes to check your bill, data usage, forward calls, hide your caller ID, and ...

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In the olden days, when everyone was still using landline phones, if you wanted to call back the last person you spoke to immediately, you'd dial *69. It was a nifty trick for quickly catching someone ...