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If cell towers are overloaded or down in some incident, but you can still find a WiFi signal, then you can still call or text or even video chat with people with apps like Skype. Pay a little extra and you can dial out to other phones or have a virtual phone number that people can ring you up on (although you're consuming your battery waiting for a call).


In the UK there is a paid for network of open WiFi hotspots called British Telecom Wifi, FON and Openzone etc

There are millions of them throughout the UK. Connecting to them for free doesn't represent a problem if you know how to go about it. wink

http://btopenzone.hotspot-directory.com/results.php?txtQuick=edinburgh