premise: The costs of roaming - the service which allows UK customers to use their mobile phone abroad - are much higher than those in France, Germany, Sweden and Italy. Many people get caught out because they are unaware of the high prices, and that they get charged for simply receiving calls whilst abroad. Less than a quarter of consumers had any knowledge of the price of using a mobile phone aboard when they bought their phone. Better consumer information is vital if prices for pre-pay international roaming in the UK are to come down.
hypothesis: Customers can be charged for calls which they do not make themselves.