One of our worst fear when using our cell phone including phone battery is unavailability of internet via 3G or especially if you need to be connected to internet all the day and lose coverage.
what Opensignal offers?
OpenSignal find the best network in our area Provides you with a free coverage map with alot of information as signal coverage ,wifi networks,2G,3G and 4G.
How this coverage map built ?
Coverage map database is collected by users of android and iphone applications including how strong signal is in any particular area, as well as all the nearby towers for your carrier.