Toggling the Roaming Data capability on the Mobile device itself does not have any impact on the Service Profile nor Roaming Profile of a SIM card.
The Data capability can be turned on/off via the Settings menu of the mobile device.
For iOs
Go to Settings > Mobile Network > Mobile Data Options:
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Toggle the “Data Roaming” option.
For Android
Go to Settings > Connections > Data usage:
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Toggle the “Roaming Data” option
Note:
The Settings menu can differ per type of mobile device and/or version of the operating system of the mobile device, we recommend that you consult the manual of the mobile device for this.