MB Smart has a Free Block-All for Android and iOS devices
It will completely block the Internet - it's not an apps-only account, no Internet will work at all, and the App Store won't either.
There are NO workarounds, and no apps will have a data connection.
Ask for support in Slack if you need to change a device from BlockAll to a regular plan.
The steps are the same as those for a regular MB Smart install. Only this does not have regular filtering.
Use the link code "blockall" and don't pay
Please note that there is no customer support for this product.
You can also change an existing account to BlockAll by doing this on the portal:
Notes For Support:
Use this TAG name: -tag--tagblockall-
To return a device from BlockAll to a regular plan, set the TAG association, and only for Android, you will need to activate this SC "Back to normal."
To download the full list of TAG Associations, click here