Hi ​@Siouxsiesue, 

We're sorry to hear about the unexpected roaming charges and understand why this would be concerning.

One possible reason for these charges is that the handset may have connected to a mobile network before mobile data was disabled, or background data activity may have occurred while roaming. To help prevent this in future, we recommend setting your Bill Cap to £0 before travelling abroad, as this helps prevent out-of-plan roaming charges from being incurred.

You can manage your Bill Cap by:

• Logging in to the iD Mobile app
• Selecting Services
• Choosing Manage Bill Cap
• Setting the Bill Cap to £0

Owethu