First of all, make sure your provider offers the possibility of payment through the terminal. For this you will have to explore his website at or just call.
If the possibility of present payment, please specify through what network the terminal can make payment. Many people are not aware of such nuances, but the payment terminals owned by different company have different set of services and charge different fees for payment.
After receiving all required information, find the nearest payment terminal belonging to the network.
In its menu, select "Internet" (may vary depending on terminal and network), locate the name of your provider.
Enter the required data (usually this is the username or ID of the contract on providing services).
Then, as and when payment of cellular communication, fill in the desired amount and take the check.