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cellumap - Cellumap is a revolution in cellular coverage maps, in that the coverage maps here are not created...
OpenCellID - OpenCelliD is the largest Open Database of Cell Towers & their locations. You can geolocate IoT & Mobile devices without GPS, explore Mobile Operator coverage and more!
CellID Finder - Find a cell phone location using LAC/CellID, GSM BTS coordinates
wigle.net - WiGLE (Wireless Geographic Logging Engine)
OpenSignal - Mobile analytics and insights on wireless connectivity from Opensignal, the independent global standard for understanding the true state of the world's mobile network.
SpeedOf.Me - SpeedOf.Me is an HTML5 Internet speed test. No Flash or Java needed!