Pay as you go used to be a simple concept. Top up cash, spend cash, top up again; maybe you'd get a free text or two if you plumped for a voucher beyond the bare minimum. 4G is relatively new to the ...

· New, free-to-download app lets users make and receive calls, texts and voicemail from their existing O2 number on any supported device · Calls are charged in line with a Pay Monthly tariff – with ...

O2 says it wants to "shake up the old habits of the mobile industry" by launching a new way for customers to pay for their smartphone. The service, which launches today, allows O2 pay monthly users to ...

O2 has launched SIM-only and mobile plans as part of its summer sale - but shoppers who are on the lookout for deals, we've found it much cheaper elsewhere. The retailer has launched a summer sale on ...

O2 HAS rolled out a free mobile upgrade which will give millions of Brits better service across its network. The new perk is now available to customers across more than 700 UK towns and cities. O2 ...