Fibre optic broadband from BT offers speeds of up to 76Mb in areas upgraded with superfast broadband technology.
BT Infinity, the fibre optic broadband service of telecoms giant BT, is now used by 1.3 million households to get online with 'superfast' speeds.
According to BT's latest financial results, an extra 211,000 customers signed up for BT Infinity broadband in the first three months of the year.
In total, BT provides broadband for more than 6.7 million households across the UK.
BT Infinity is a fibre-to-the-cabinet (FTTC) broadband service, which means fibre optic cable is used to connect each cabinet - the green box at the end of the customer's street - while a copper phone line carries the broadband into the customer's home.
The service is currently available to around 50% of the UK population, around 15 million households. As BT continues its roll-out of fibre optic upgrades, with backing from the UK government, it's hoped BT Infinity will reach 66% coverage by spring 2014.
Ian Livingston, chief executive of BT, said: "We're doing what we said we'd do. In an environment where it's easier to focus on only the short term, we're investing in our future and delivering growth in profits and dividends.
"We're driving fibre across the UK, launching high-quality sports channels, investing in the high-growth regions of the world and will use our Wi-Fi capabilities and 4G spectrum to make sure our customers will be the best connected."
Yesterday, BT announced that its new sports TV package, BT Sport, would be offered free of charge to all BT broadband customers. It means, for the first time in 20 years, weekly live Premier League football will be free for anyone to watch on TV, provided they have BT broadband.
In addition, BT has also signed a deal with O2, to build a high-capacity 4G network to enable the mobile operator to follow EE in providing the 'next generation' of mobile internet.