Hi ​@Sludge78, 

Thank you for reaching out, and I'm sorry for the confusion and concern caused by the roaming notifications. I understand why this would seem strange when your app is still showing 19/20GB remaining.

The notifications may indicate that your handset has connected to a roaming network that isn't one of the expected partner networks for your destination. If your Bill Cap wasn't set to £0, chargeable roaming usage could have been incurred and may have caused you to reach your Bill Cap, even though you still have data remaining within your inclusive allowance.

We'd recommend checking your network selection and roaming settings to make sure your handset is connected to the appropriate network for your location.

You can find step-by-step guidance here:

iD Mobile roaming troubleshooting guide

To help prevent any further unexpected roaming charges, we'd also strongly recommend setting your Bill Cap to £0 while you're abroad. This will prevent further chargeable out-of-plan usage.

If you're still receiving roaming notifications or you're unsure why the charges have been applied, please contact us via Live Chat so our team can review the roaming activity on your account and provide further clarification.

Owethu