wrote in message
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Smartphones with Virgin, EE, and Vodafone can be used on well over 100 LUL
platforms

How many of those are above ground?

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Its wifi on the platform see

http://www.techweekeurope.co.uk/news...in-media-99818

Then you use the App

http://www.techradar.com/news/phone-...ll-app-1110267

Ian