Drunk and vulnerable to the suggestions of his mates, John Anthony Miller impersonated a female friend’s ex partner, and left a sexually suggestive voice mail on a woman’s mobile phone.

The late night call contained vulgar language and a number of lewd propositions, including that the woman have sexual contact with the friend's ex partner at work.

Offended, the woman took the matter to police.

An embarrassed and remorseful Miller appeared in Port Kembla Local Court on Tuesday to pay the price for his juvenile prank, pleading guilty to one charge of using a carriage service to offend.

The court heard the 29-year-old had been drinking with mates at a party on November 29 when a friend was going through contacts in her old phone and ‘‘they’’ decided to play the prank.

Miller changed his mobile settings to private and called the woman, who he did not know, just after 11pm.

It was an act Miller would immediately regret when police knocked on his door two months later.

Sentencing Miller, Magistrate Geraldine Beattie described the prank as drunken and juvenile, but accepted that it was out of character and he had shown remorse by apologising to his victim.

No conviction was recorded but Magistrate Beattie ordered Miller to forfeit $500 and enter into a nine-month good behaviour bond.