Glen Hutch (24) is servicing time in jail for his role in a hijacking.
His Facebook profile was updated last week asking women to contact him as he would be released in the coming months.
In the message, Hutch asks: "Any girls out der that wanna send us ur number through mail we have a laugh just for the time being. Out ina few months time to part (y)!"
The Finglas man was jailed for five years, with two suspended, for his part in the hijacking.
Hutch received numerous responses to his Facebook plea, including one woman who posted saying: "A bit of xmas love for u xxx", and another who encouraged him, writing: "Dats it glen ye mad thing ha".
A note accompanying the message on Hutch's page states that it was uploaded on December 17 "via mobile".
A mobile phone was confiscated by prison authorities during a search of his cell last week and handed over to the gardai.
A garda spokesman refused to comment on the specific case but said: "Any formal complaint made would be investigated by the gardai."
According to a spokesman for the Prison Service, a summary conviction for the illegal possession of a mobile phone in prison could result in a fine of up to €5,000 or an additional sentence of up to 12 months.
Penalties for conviction on indictment include a fine of up to €10,000 or a jail term of up to five years.
Hutch, of Mellowes Road, Finglas, pleaded guilty to hijacking a car in January 2010.
The prison service spokesman said that more than 1,300 mobile phones were found in the possession of inmates in Irish jails last year.