Local Calling Public telephones accept either coins or pre-paid telephone cards. Coin phones accept W 10 and W 100 coins, and some will also accept W 50 coins. Local calls cost W 50 for 3 minutes. As time is about to run out, the receiver will make a beeping sound. The time can be extended by adding more money.
Many people make a hobby of collecting phone cards, given the variety of their patterns.
Note that many card phones only accept Korean phone cards, not international pre-paid cards. The amount remaining on the card will be displayed and you will hear a dial tone. Punch in the number to call. When your call is connected, the amount of your call will be deducted from the card in periodic increments. When you hang up the receiver, the card will be ejected from the slot.