Prepaid edit

A customer visits the call shop, and pays the operator for the call. The operator then activates a phone booth for the customer with billing software. The customer then goes to the phone booth and dials the destination number. The billing software records the call details and corresponding charges for future reference.

Postpaid edit

Postpaid calling operates in a similar manner, except that when the customer has completed their call(s) the call-shop operator generates an invoice.