Three's mobile broadband network is now responsible for handling around 40 per cent of all 3G data in the UK, the firm has claimed.
Despite being the smallest of the five main mobile broadband providers – after Vodafone, O2, T-Mobile and Orange – the firm is claiming a significant market share.
Phil Sheppard, Director of Network Strategy at Three, explained that around 137 terabytes of data pass across the firm's network every day.
This is roughly the equivalent of 35.8 million iTunes tracks being downloaded on a daily basis, he noted.
"Bringing things down to a more local level, the amount of data used on our network within the M25 alone during the month of October could be used to download 360 million iTunes tracks," Mr Sheppard added. "That's 36 million albums worth of music."
He claimed it is "brilliant" how many of Three's customers have embraced mobile broadband over the last year.
Recently, the broadband provider revealed that mobile broadband accounts for 97 per cent of data transmitted over its 3G network.
As such, the service provider is urging the government to press ahead with the 4G spectrum auction, as rising dongle, tablet and smartphone usage pushes the firm's 3G network towards saturation point.