Long-Term Evolution (LTE) is being adopted around the world as the primary cell-phone communications service. Multiple 2G and 3G cellular radio methods are being phased out as carriers build their new LTE networks. It will be years before this expansion is complete, and older radio technologies like GSM and CDMA will coexist with LTE for a while (see “The Evolution Of LTE,” www.demo.electronicdesign.com/content/evolution-lte ).
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