Holidaymakers who use a mobile phone on contract with a foreign operator must carefully check the cost of roaming services in France, or they may get a nasty surprise upon their return. Smartphones can be set up to avoid excessive Internet use. For example, app updates aren't always essential, and sometimes there's no need for automatic updates. Your phone setup should therefore be adjusted to prevent unused apps from gaining Internet access, or even totally disable data downloads. Mobile phone operators allow you to monitor your consumption and associated costs in detail. In the first few days of your holiday, we recommend connecting to your operator in order to check the figures and ensure that your phone usage isn't running up an astronomical bill.