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Telefonica UK Limited, trading as O2 (stylised as O 2), is a British telecommunications services provider, headquartered in Reading, England which operates under the O2 brand. It is owned by VMED O2 UK Limited, a 50:50 joint venture between Telefónica and Liberty Global.
The O2 (formerly known as The Millennium Dome) is a large entertainment district on the Greenwich peninsula in South East London, England, including an indoor arena, a music club, a Cineworld cinema, an exhibition space, piazzas, bars, restaurants, and a guided tour to the top of the O2.
Whether you’re looking for a sparkling new device, a contract that fits your needs, or have some questions about your existing device or contract, we’ve got you covered. You can also come in store to top up your Pay As You Go account.
Check your 2G, 3G, 4G and 5G network coverage with the O2 Coverage Checker. Includes call and mobile internet reception – as well as your nearest O2 Wifi hotspots.
