Three has become the latest mobile broadband provider to launch 4G services in the UK, following the path taken by EE, O2 and Vodafone.
The firm launched its next-generation network on Monday December 2nd, and is now offering faster speeds to consumers with a 4G-ready device in some areas.
Initially, Three subscribers in parts of London, Birmingham and Manchester can take advantage of super-fast mobile broadband.
The service provider said the rollout will accelerate in January 2014, with new locations added to the UK 4G network.
Three aims to cover 50 cities with 4G connectivity by the end of next year, and 98 per cent of the population by the end of 2015.
Dave Dyson, Chief Executive at Three, said his company "is building a brand and network that encourages and enables customers to enjoy the mobile internet".
"Customers are using more data than ever on Three, far more than on any other network," he stated. "As we add 4G capacity to the network, this experience will only get better.”