CDMA vs GSM vs LTE, What is the difference?

CDMA  (Code Division Multiple Access) is a "spread spectrum" for cellular networks enabling many more wireless users to share airwaves than alternative technologies. GSM  (Global System...
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What is a PUK Code?

PUK or 'Personal Unlocking Key' or 'Pin Unlock Key' is a security feature on most mobile devices that protects your SIM card data. A PUK code is required when a SIM Card Pin Code has been...
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