But instead of relying on global positioning or cell tower triangulation to plot you and others on a map, FireChat relies on Bluetooth and Wi-Fi to transmit messages between nearby users. In other words, you can open the app in the basement of your university library and chat with others, even if you dont have cell service. With each new user that logs on, FireChats range expands. As long as there is a FireChat-enabled device to act as a node in the chain, theres really no geographic limit to how big the ad hoc network can be, creator Micha Benoliel told GigaOm.
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