Mobile broadband data now accounts for the vast majority of Three network traffic, it has been reported.
In a blog post, Phil Sheppard, Director of Network Strategy at the broadband provider, said demand for broadband services has soared since June 2010.
As such, 97 per cent of broadband traffic is now mobile data, he claimed.
Mr Sheppard explained that in the space of just 14 months, there has been a 427 per cent increase in data usage by dongle users and other mobile customers.
"Downloading apps, streaming movies, getting around town with Google Maps, even checking in on Facebook - it all adds up," he noted.
Advocates of 4G mobile broadband believe this is even greater reason to press ahead with the auction of unused 800 MHz and 2.6 GHz radio spectrum.
The government recently announced that the auction will not be staged until late 2012 - a decision which angered Three, whose 3G network is said to be nearing saturation point.