annar26 Hi there
you can use your goodybag for 63 days (in any four months period) in EU like you use in the United Kingdom
After those 63 days, you will be charged reduced rates of 0.36p/MB for data, 3.2p/minute for calls and 1p/text for texts.
make sure you have enabled your data roaming.
by default roaming should be on
You can check here if its on or not
If that doesn’t fix it, try to perform a manual roam.
For manual roaming
Go to Settings
Then go to Mobile networks and select a network other than O2-UK, giffgaff, Tesco Mobile or other O2 MVNOs. For example, try Vodafone, EE or 3
When you exit the menu the phone should lose the network.
Repeat the process and select O2-UK as your mobile network unless you’re abroad in which case you should select “select automatically”
For more information visit link below