O2

O2 now offers 'custom' tariffs which allow customers to choose how and when they pay for a device – but you could save £100s/yr by shopping around.

Mobile phone provider O2 has apologised after charging its customers extra for a supposed 'loyalty discount'.

Smaller - and cheaper - networks have come out on top in MoneySavingExpert's mobile provider poll.

O2 is offering new and upgrading customers a 'free' six- or 12-month Netflix subscription - but only for high data users.

Samsung's new Galaxy S9 and S9 Plus smartphones officially launch today. Buying a Samsung is never MoneySaving – but if you're determined to get one anyway, buying the right way instead of getting a standard network contract could save you more than £550 over two years.

O2, Three and Vodafone have joined EE in announcing price rises for pay-monthly mobile customers this year, MoneySavingExpert.com can reveal.

Around two-thirds of mobile phone customers use less than 3GB of data every month, a poll of MoneySavingExpert users has revealed - despite mobile networks increasingly pushing high-data deals.

TalkTalk Mobile customers will not have their mobile contracts renewed and will instead be offered an O2 deal - but don't assume it's the best one for you.

O2 is slashing the price of calls, texts and data on its pay-as-you-go tariff by up to 80%.

A MoneySaver has won an apology, refund and compensation from mobile phone firm O2 after it told him calls from the US would cost 0.99p per minute but actually charged him 99p. Other customers may also have been given wrong info – if you've roamed abroad with O2, here's what to check.