Tens of thousands of Three mobile users will pay up to £5 to use their phones overseas - despite currently getting that for free.
These Sim-only and pay monthly out-of-contract customers are set to lose their current free roaming perks, which they currently get at no extra cost when visiting 71 countries.
Instead they are being asked to sign new deals that will mean paying £2 a day when roaming in Europe or £5 in some non-European destinations.
