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 ...

British mobile network operator O2 today updated its cross-platform mobile payments and price comparison app, O2 Wallet, so that users can now add credit to up to five different ‘Pay & Go’ mobile ...

· 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 ...