Why does it cost more to use my mobile abroad?
International roaming is a service offered by mobile providers that allows you to use your mobile phone abroad.
Your UK mobile provider will not have a mobile network in the country you’re travelling to - though they may belong to the same group as a foreign provider – so whenever you use your mobile abroad you are ‘roaming’ on the foreign provider’s network.
The foreign mobile provider charges your provider in the UK a wholesale charge for your use of its network. Your provider will then pass this on to you as part of its retail charge for the international roaming service.
Learn more about using your mobile abroad