Rival EE pipped it to the post in the race to become the first 5G mobile provider in the country last month but it is now live in seven British cities.
It is being launched today in Birmingham, Bristol, Cardiff, Glasgow, Manchester, Liverpool and London.
A range of 12 towns and cities across the UK will be added later in the year - including Birkenhead, Blackpool, Bournemouth, Guildford, Newbury, Portsmouth, Plymouth, Reading, Southampton, Stoke-on-Trent, Warrington and Wolverhampton.
Specialist 5G SIMs and handsets are required to access the network. Samsung, Oppo, Xiaomi, One Plus and LG have either already released, or will be releasing various handsets....read more>>>...