The number of unused units left on the card will appear in the window of the phone. Basic instructions will also appear in Romanian and English. Dial the desired number following the instructions. When finished, hang up the receiver and retrieve the phone card. In the post office, either ask the attendant which booth is free or, if it is clear, then go in an empty booth.
Cash is standard.
To make two calls, one must pay for the first before making the second since the phone automatically disengages when the receiver is hung up.