UK's biggest mobile phone firms failing on customer service - worst offenders - Mirror Online
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The O2 Customer Service UK 2021
O2, EE, Vodafone and Three customers 'paying more for a mediocre customer service' - Wales Online
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O2 network BACK UP after 24hr service BLACKOUT but some customers still face issues | Express.co.uk
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O2 network down! Customers in UK furious over coverage problems and service issues | London Evening Standard | Evening Standard
O2 down - Mobile network leaves thousands of customers unable to make or receive calls | The Sun
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Furious O2 customer claims worker changed mother's maiden name on her account to 'idiot' | The Sun
Mobile Operator O2 UK Pledges Better Customer Service - ISPreview UK
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O2 | Mobile Phones, Mobile Broadband & Sim Only Deals
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O2 launches 'first' Twitter self-service platform
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O2 customer service nightmare: Ten people in three hours to cancel a phone | This is Money
O2 Live Chat - Live Chat Directory
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O2 experiences top and bottom-line growth for third year in a row | Capacity Media
