Data roaming lets you use the internet and data services on your iPhone 5 when you're outside the UK.
Switching data roaming off on your iPhone 5 is easy and can provide peace of mind while you're abroad.
However, EE will not let you use data roaming without buying an add-on first.
How to turn data roaming on or off
1. from the homescreen, tap Settings
2. go to Mobile Data
3. tap Mobile Data Options and turn on/off Data Roaming