That’s not possible. As of 12/12/2016, all Belgian telecom providers are legally required to identify users of top-up phone cards. If you have an active JIM Mobile SIM card, this means that you have been identified.
Do you already have a prepaid card? You can continue to use it. We will contact you in good time if we are missing information. Should you fail to confirm your identity, we will be obliged to disconnect your smartphone number.