The O2 Store is a chain of retail stores operated by Telefónica Europe, specializing in mobile phones. As of January 2014, O2 has opened over 450 stores in the United Kingdom.[1] O2 Stores come in 2 formats - Franchise and Retail. The latter are owned and maintained by O2 UK directly, as opposed to private investors. The majority of stores have an O2 Guru, effectively a Technical Specialist. This free service is offered to all consumers, whether they are a Telefonica customer or not.