Mobile network Three has begun its 4G rollout in four towns and cities in the UK, with aims to bring the service to 1.5 million customers by the end of February.
Three's 4G LTE service is currently available to users with a 4G device in London, Manchester, Birmingham and Reading, with 42 more towns and cities set to be added next year.
"We are building a brand and network that encourages and enables customers to enjoy the mobile internet," said Dave Dyson, Chief Executive of Three. "Customers are using more data than ever on Three, far more than any other network. As we add 4G capacity to the network, the experience will only get better."
The network hopes to cover 98 per cent of the UK population by the end of 2015. Unlike other networks that currently offer the service, Three is offering its customers 4G at no extra cost to their current tariffs.
Subscribers who currently own 4G handsets will need to install a software update before their devices can be used on the 4G network.
Three first announced the launch of its 4G network in August, on the same day that O2 and Vodafone switched on their 4G networks for the first time.
Today's official confirmation from Three coincides with EE's announcement that 10 more towns have been added to its 4Gnetwork, as it aims to cover 160 by Christmas.