Building a phone network for the zombie apocalypse

You can stick to a Wi-Fi network on the main base with just a few towers for outer regions, putting up a new one every time a new region is explored. You also won’t be privileging voice calls, so you don’t need a distinction between your phone number, your email, and your screen names on various services. And with the bulk of the traffic flowing over internal Wi-Fi, there will be a lot less data to be moved overall.

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