You can enable or disable data roaming by logging into your MyGO account and:
1. Clicking on ‘Settings’ in the Menu bar
2. Clicking on ‘Data roaming limits’ on the side menu
3. Clicking on ‘Manage’ next to your preferred mobile number
4. Clicking on the ‘Enable’ / ‘Disable’ button and confirming the change
You can change the roaming limit on all the Pay Monthly and Smart+ mobile numbers that are part of your billing account, when the billing account is linked to your MyGO account.
If you linked your Top-up mobile number as a service, you have the rights to change these settings as the change does not affect the bill but only your top-up credit, which you are in control of.