Mobile operators will be able to roll-out 4G services to the vast majority of the UK in the first half of next year, six months earlier than previously estimated. It follows Everything Everywhere's launch of a 4G service ahead of Christmas.
Boris Johnson is speaking at the launch of the UK's first 4G network.
The Mayor of London quipped that 4G shouldn't be confused with security firm G4S or it "might not be popular."
While all the hype of the 4G launch happens in London, I'm at the real frontline of UK digital technology: Thelkeld in Cumbria.
As new generation mobile Internet is announced in Britain - there are questions about competition, costs and the consumer.
What is 4G,? How will it change our networks? Everything you need to know about 4G.