Travelling in Europe, suddenly stopped being able to use data or connect to WiFi

[Bert1]

I’m travelling in Europe, and my phone has been working as normal: using internet, connecting to WiFi networks etc but has suddenly stopped. I’ve got plenty of data. Any ideas? 

[jonsie]

How long have you been travelling?

O2's fair usage policy limits you to 63 days of allowances in any 4 month period

Roaming Fair Usage | Terms and Conditions | O2