For outgoing calls, the usage time begins when you first click Send or the call creates a connection to a network, and when the call is received, it begins when the call connects to a network (perhaps before it rings). The usage time may end a few seconds after the end or separation of the call connection. For calls that are made on our network, we only charge for calls received, including machines. For the Postpay service, the use cannot always be processed immediately and can be included in a subsequent invoice, but the use is always charged to your remuneration for the month in which the service was used. Now, you need to calculate the amount of money you need to pay to start this process….