Vodafone has begun the rollout of a new technology that promises to improve access to the fastest mobile broadband speeds.
The broadband provider's Carrier Aggregation service - also referred to as LTE Advanced or 4.5G - allows the firm to provide higher average speeds to more simultaneous users.
Vodafone network users can benefit from a service boost both indoors and outdoors, helping to improve their online experience wherever they are, and through whatever device they are using.
Faster 4.5 mobile broadband will initially be available in Birmingham, Manchester and London, with other UK cities set to follow later in 2014 or next year.
Vodafone said the new service is "particularly well-suited" to the 800MHz and 2.6GHz spectrum it secured in the auction of spring 2013.
The firm explained that low-frequency 800MHz spectrum travels further and penetrates better through walls - allowing it to provide the best network coverage - while 2.6GHz is ideally suited to smaller geographical areas of high population density.
Fergal Kelly, Technology Director at Vodafone UK, described 4.5 as "a clever technology" which represents the "next big step" to deliver faster broadband speeds per user.
He added that it will help increase network capacity, allowing more customers to enjoy a great 4G experience when and where they want it.
Vodafone originally launched 4G mobile broadband services in the UK in August 2013, around ten months after EE activated Britain's first super-fast mobile network.
The company pledged to invest £1 billion in its UK network during the course of 2014, with a view to delivering the best possible customer experience.
Initiatives undertaken this year include the nationwide provision of high definition voice technology and the Vodafone Rural Open Sure Signal programme, which is aimed at providing 3G coverage in remote communities.