London, Manchester, Bristol, Birmingham, Cardiff, Edinburgh, Leeds, Liverpool, Sheffield, Glasgow and Southampton will have access to network EE's 4G from Tuesday morning.
Other mobile networks will not be able to offer 4G until next year.
The 4G network, which offers speeds up to five times faster than 3G, will be available on the Apple iPhone 5 as well as devices from HTC, Samsung, Nokia and Huawei.
The extra speed and capacity allows for high-quality streaming of audio, video and other content while on the move.
