Frog Mobile is a pre-paid mobile service, offered in Greece and Romania by companies within the group of Greek mobile operator Cosmote. Sometimes, it is wrongly labelled mobile virtual network operator but is in effect a no-thrills, low-cost pre-paid service aimed at budget users and people with limited economic opportunities or people interested in basic mobile communication only.
Frog Mobile Greece
Frog Mobile in Greece is owned by Cosmote, one of the three major mobile network operators of Greece.
References
Frog Mobile Wikipedia(Text) CC BY-SA