EE’s 4G network now covers 300 towns after the operator switched on availability in 19 more locations including Banbury, Greenock and Warwick.
EE also confirmed that its so-called LTE-Advanced network, dubbed 4G+, is now live in London, which can offer speeds of 150Mbps.
However, only two phones available in the UK support this standard: the Samsung Alpha and the Samsung Note 4.
The 4G+ network uses EE’s 2.6GHz spectrum and is now available across large areas of central London, including Shoreditch, Old Street, Southbank, Soho, Westminster and Kensington.
EE aims to have 4G+ coverage across Greater London by June 2015, and then take it to Birmingham, Liverpool and Manchester.
The operator said that 4G+ speeds are likely to be around 90Mbps on average, although customers will see speeds as high as 150Mbps.
EE chief executive Olaf Swantee said that the switch-on underlined the huge leap forward the UK has made in mobile networks.
“The UK is now back to being a world leader in mobile networks. Just two years since we were behind every developed market from the US to Japan, we’ve invested in innovation, driven competition and given people in London a mobile network that’s faster than almost any other in the world, and even faster than most fibre broadband available here," he said.
Reaching 300 towns is also another notable milestone in the rollout of 4G services. The other locations now live are Alexandria and Penicuik in Scotland, Limavady and Cookstown in Northern Ireland and Ystrad Mynach in Wales
In England, Biggleswade, Blaydon, Catterick Garrison, Garforth, Holmfirth, Maltby, Oxted, Tring, Waltham Cross, Warminster and Winterbourne are now live.
EE also revealed that it has reached six million customers, up from the 5.6 million revealed in its latest earnings update.
Finding refutes many earlier studies that suggest that galaxies don't have much dark matter at the time of their birth
Boris the robot outed as man in rented robot suit
Mission will provide vital data about the performance of rocket, spacecraft, autonomous docking system and the landing system
The flight will take off from California's Mojave Air and Space Port and could happen as soon as 13th December