OpenSignalMaps is a website I stumble upon which enable users to check the cell phone network coverage around the world. Depending on the country or area users browse, the site will show the network companies and type of network services available. There is a signal color bar beside which shows red color when the signal is strong and blue color when the signal is weak. That is the reference which users can base on when browse through the map. One thing that I’m curious about is the relevancy of the signal strength shows on the map. The signal strength varies as you zoom in and out. Just try it out and you’ll get what I mean.
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