Public telephones used to be common throughout Poland. But, as in other countries, are rapidly disappearing due to the almost universal ownership of mobile phones / cell phones. If, however, you need to use one and can find one you cannot use coins, you will need a prepaid phone card. These can generally be purchased from post offices and many kiosks.
The Polish words used to describe a public telephone booth are ‘Budka telefoniczna’ and ‘automat telefoniczny’.
In most public telephone boxes it is also possible to ask whoever you are calling to ring you back, if you can see the number displayed.