The Billmonitor.com price comparison website says over three-quarters of UK mobile phone customers are on the wrong mobile tariffs, which is costing those people almost £5 million annually. It's analysed over 28,000 mobile phone bills and has compared than against over 8.5 million tariff options from O2, Orange, Vodafone and T-Mobile.
Billmonitor's calculations show that those 76% of UK mobile customers on the wrong tariffs are wasting an average of £194.71 each per year.