The struggle with SIM cards can be an annoyance when upgrading to a new cell phone or reverting to a backup. Haven’t we come far enough with technology that such a thing shouldn’t matter anymore? What is a SIM card and why is it so important? Is there a way to use a mobile phone without requiring one? Keep reading to find out. What Are SIM Cards? In the world of mobile phones, there are two primary phone types that are available to consumers: GSM (Global System for Mobile) and CDMA (Code Division Multiple Access). GSM phones are the ones...
Read the full article: Why Do Cellphones Need a SIM Card?
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