By 2013, the number of base stations supporting wireless networks will increase to 5.7 million, up from 3.6 million in 2007, as networks expand and 4G technology becomes more of a reality, according to a new report by ABI Research.

One reason for the increase, according to the report, is the proliferation of Mobile Internet Devices (MIDs) such as Apple's iPhone 3G, RIM's BlackBerry Bold, and Nokia's E71, which add increased network traffic and email access. As these devices become more commonplace and less high-end, the demand for bandwidth and the necessary network support needed to sustain that growth is only bound to increase.

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