A woman has been jailed for nine months for smuggling mobile phone into Mountjoy prison.

Kirsty Doyle of East Wall, Dublin, pleaded guilty at Dublin Circuit Criminal Court to bringing a prohibited item into the prison September 9, 2013.

The court heard that Doyle was addicted to heroin and crack cocaine at the time and agreed to smuggle the phone into prison in exchange for €500.

She refused to tell gardaí who had asked her to do the delivery and for whom the phone was destined.

Garda Peter Twomey told the court that when Doyle walked into the prison screening area the metal detector device was activated.

Prison officers took her aside but she initially denied having anything on her that may have set off the detector.

However soon after she admitted that she had a package and handed over a small mobile phone wrapped in a condom which she removed from her underwear.

Doyle told gardaí she knew it was wrong but said she was homeless at the time and needed the money.