Best phone providers where you can save up to £700 ranked - from O2 to Vodafone

Customers using the perks available to O2 customers could potentially make savings of up to £700, according to research from Uswitch.

The price comparison site compared SIM-only deals available from major UK mobile phone providers and found that O2 offered the "most valuable perks" over a longer period.

O2 perks which customers can claim each week include things such as free Greggs coffee, sausage roll and a breakfast roll and a free Odeon cinema ticket - you can shop with O2 here.