O2 is a leading digital communications company with the highest customer satisfaction for any mobile provider according to Ofcom. With over 25 million customers, O2 runs 2G, 3G and 4G networks across the UK, as well as operating O2 Wi-Fi and owning half of Tesco Mobile. Get more with O2 thanks to O2 priority giving you exclusive offers, tickets and more so you get to enjoy an excellent network and the best from the UK high street and online brands. O2 has over 450 retail stores and sponsors The O2, O2 Academy venues and England Rugby. Partnering with them allows us to offer fantastic O2 mobile phone deals at the best possible price, plus if you order your O2 mobile deal with us today, we can offer you free next working day delivery! (Subject to timely network and security acceptance and stock availability).