The network offers us a unique glimpse into the future of superfast mobile broadband.
Our trial will run until summer 2012, and will give hundreds of consumers, businesses and venue owners a chance to test the latest 4G technology.
The network stretches from Hyde Park to The O2 in Greenwich and has been designed to cover key areas of the capital, including Canary Wharf, Soho, Westminster, South Bank and Kings Cross.
4G can be as fast as the fastest landline fibre home broadband connections – more than ten times as fast as 3G. At these speeds, the time to download a 500MB file could be as quick as under one minute, compared to over 5 minutes on 3G.