O2

Customers fume as O2 network takes Bank Holiday off Widespread network outage upsets O2 customers - including those in high places

Three to buy O2 for £10 billion Hutchison Whampoa deal will take UK operators from four to three

BT set to snap up O2 this week BT set to swoop for O2, paving the way for a merger between Three and EE

O2 is worst mobile network for London's squashed commuters Paying thousands of pounds a year to crawl into London on an overcrowded train? Hopefully you don't use O2

O2 launches 4G in London, Leeds and Bradford O2 joins the 4G battle in London, Leeds and Bradford, with plans to go live in a further 10 cities by the end of the year

O2 Broadband review With a generous 100GB allowance and excellent customer feedback, O2's All Rounder is our Best Buy service