How Phones Work

1

`Transmitter towers’ than can pick up and send radio signals are made all signals are made all over the world.


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Are QR Codes Replacing Barcodes?

11

The Japanese corporation Denso-Wave created QR code in 1994. More than a decade later, the code is gaining popularity in advertising and art around the world.


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What Imei, PAC and PUK Have to Do on my Phone

1

Three important acronyms you should know especially if you have your own mobile phone or cellular phone.


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