General Views Of O2 Mobile Stores As Hutchison Whampoa Ltd. Enters Talks To Buy O2 For 10.25 Billion Pounds [Getty Images]

O2 branded USB wifi devices sit on display inside an O2 mobile phone store, operated by Telefonica SA, in Manchester, U.K., on Friday, Jan. 23, 2015. Hutchison Whampoa Ltd. said it has entered exclusive negotiations to buy O2, Telefonicas U.K. wireless carrier, for as much as 10.25 billion pounds ($15 billion). Photographer: Paul Thomas/Bloomberg via Getty Images

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