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The RAT application points the user in the direction of better phone signal, measures signal strength, data speed and reliability, and displays nearby Wi-Fi networks. Users of the app share information with OpenSignal, which is used in their independent maps of carrier coverage and NetworkRank service.

RAT crowdsources signal data from their users in order to measure the true state of carrier coverage. By crowdsourcing their data from client devices, RAT are able to build a picture of the network as it is experienced by its users, rather than modelling coverage using drive testing.