Solving my O2 overseas mobile data problem | Ertblog
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O2 revives 'ridiculous' EU roaming charges and customers aren't happy | Express.co.uk
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O2 Celebrates Being The 'Odd One Out' With Tactical Advert As It Becomes The Only Major UK Network To Rule Out Roaming Charges In Europe – Marketing Communication News
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Virgin Mobile and O2 users will not face EU roaming charges - BBC News
Virgin / O2 not introducing EU roaming charges : r/UKPersonalFinance
EU Roaming charges: data caps on EE, Vodafone, Three and O2 and more explained | T3