Mobile operator Vodafone has announced price increases that could add 10% to monthly bills. The amount charged on usage beyond a customer's allowance will rise, but contracts themselves will not change. Vodafone will estimate how much bills will rise based on a three month profile of each customer's bill. It will then warn customers if their bills are to rise above 10% and give them the right to leave the contract without charge. But the company says if they wish to do so, they must write to Vodafone before prices are raised on 28 June. The move comes as Vodafone announced reduced European roaming prices. Vodafone said to affected customers in a statement on its website:"We really hope you decide to stay with us, but as these changes have increased your monthly bill by more than 10%, you can end your agreement without charge," .....Read more here