Why do I have to give ongoing payment details when buying a SIM instore?

Belong mobile is a postpaid service which means each month we take payment for your plan amount and any add-ons.  

When you buy a Belong SIM in store your $25 or $45 credit contributes towards your monthly payment.  

By setting up your payment details when you connect, we can take payments for your plan and add-ons should you use all your credit.