Six European mobile phone operators have decided to halve wholesale roaming fees in a move that will lead to substantial cuts in costs for end-users, T-Mobile, the mobile phone arm of Deutsche Telekom has announced. T-Mobile, Orange, Telecom Italia, Telenor, TeliaSonera and Wind, which together have around 200 million mobile phone customers, “have agreed to cap the average wholesale rates they offer each other for providing roaming services… by around half,” T-Mobile said in a statement.