O2 offers sim only tariffs for iPhone

Having lost its exclusive deal for Apple's iPhone, O2 is taking on competition from Orange, Vodafone and Tesco mobile by offering existing iPhone owners cheaper, sim-only contracts.

Anyone willing to sign up for a 12-month contract will get 300 minutes of calls, unlimited texts and unfettered data and wifi access for £15 a month. Yearly contracts come in a variety of flavours - all including unlimited texts and data - rising in £5 increments up to the top tier which sits at £45 for unlimited everything.

The company is also offering monthly rolling contracts with the same amount of minutes for a fiver per month extra.