
A majority of phones and tablets that access the Internet use a Subscriber Identity Module or SIM card. Its purpose is to provide an ID for your mobile device, one that’s used by a cellular provider to give the device service, a signal, and basically sort your phone or tablet out from the zillions of other phones or tablets.
Oh, and it’s used to help with billing. So there’s that.
My question is this: Does the mobile device really need a SIM card?
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