Figures from enterprise Wi-Fi provider iPass confirm London's position, based on the number of Wi-Fi sessions completed on its virtual Wi-Fi network, pieced together from different wireless providers.
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Europe overall increased its worldwide share of Wi-Fi hotspot use to 40%, up from 31%.
Europe is now set to overtake the US in Wi-Fi use, said iPass, with the US seeing its percentage of iPass sessions in the second half of the year falling from 59% to 51%.
The top four Wi-Fi locations in order are London, Singapore, Tokyo and New York.