In the 4.2 million speed tests conducted across the UK by telecom regulator Ofcom, it was revealed that mobile broadband by O2 provides the fastest broadband.

Ofcom’s study found that O2 loads webpages quicker than any other UK network. It also found that Orange fared worst in the speed tests. T-Mobile service is slower than than Vodafone, 3 and O2, the report said.

Ofcom has asked consumers to check coverage before buying a connection as its study found that speed varied greatly depending on location. The study found that the average download speed across all networks was 1.5Mbps. It was around 30% higher at 2.1Mbps in better coverage areas.

Ofcom chief executive Ed Richards said the research gives consumers a clearer picture of the performance of mobile broadband dongle and datacards.

O2 chief technology officer Derek McManus told the BBC, "Our customers are seeing the benefit from the huge investment we have made in our network. We always aim to deliver the best network experience for our customers and these results are another indicator that we are doing just that."

Everything Everywhere of a partnership between T-Mobile and Orange has not commented on the findings so far.