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British boffins at BAE are testing Navsop, a navigation system that uses signals from mobile phones, TV and Wi-Fi.
Defense firm BAE Systems reckons the technology will be the size of a coin -- but it isn't quite ready to fit in your phone just yet.
Hit play for the latest on Jelly Bean, Firefox OS, a map that goes where GPS can't, and to learn why your phone is working you too hard.