I was doing some research today and stumbled across Serval, which looks to be a fascinating project. It's developing software to run on Android devices to enable voice, text and file transfer services through a meshed network of devices, suitable for use in disaster areas and rural communities without traditional coverage.
The gory detail is available here.
The future of mobile telephony? Probably not in any mainstream way, but potentially a very good way to communicate outside a normal system, especially if the traffic is end-to-end encrypted, as a quick look at the architecture suggests to me that it would be rather prone to interception. Perhaps not a major concern for its intended uses, though.
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