14515
Dial 14515 from OTE landline to get a PIN which gives you 5,95 € value of calling time (also represents the call cost to 14515 - including V.A.T.)
From landline:
807 3737
Each time: dial 8073737 (from landline/ without charge). Press 2 for English.
Enter the PIN code and afterwards press the hash key (#).
Dial the number you wish to call and afterwards press the hash key (#).