Any apps or features that require an internet connection will use data and be subject to roaming charges if used abroad. These include:
• Social networking apps such as Facebook and Twitter
How To Turn Off Data-Roaming
Settings > More Networks > Mobile Network > Untick Data Roaming
This is a simple way of preventing your phone from connecting to other data providers when you are out of range from your domestic carrier when abroad.
Use Wi-Fi Whenever Possible
You can connect your iPhone using a local Wi-Fi connection to avoid data charges when travelling. Many hotels, cafes, restaurants and other public places offer free Wi-Fi to visitors, usually accessible through a pass-code or straightforward public access.
Some Wi-Fi hotspots do charge for access, but you should be informed of that before you start using the connection.
Quick menu (scroll down from top of the screen) > hold down the Wi-Fi button > select a network
You may need to ask the network name and passkey.
How To Turn Off Apps and Downloads
Settings > data usage > tap more options (this is either an option on the screen or a physical button on your device) > tap restrict background data > tap ok
We advise speaking to a line manager before travelling to ensure a data-roaming bundle is added to your package.