The triple killer then stopped eating in the belief he would not pass in turn

He thwarted investigations by refusing to sit on a body scanning device

Triple killer Kon Georgiou has finally relieved himself of a mobile phone that has been stuck up his backside for 12 days.

The inevitable passing took place in an observation cell at Sydney's maximum security Goulburn Supermax on Tuesday after the Rebels bikie staged a hunger strike in an bid to keep the banned phone in his clutches.

A spokesman from Corrective Services NSW confirmed the phone had been seized by prison authorities following a near-two week ordeal, reports Daily Telegraph.

Rebels bikie Kon Georgiou has finally passed relieved himself of a mobile phone that has been stuck up his backside for 12 days

'Inmate Konstantinos Georgiou is no longer in possession of a mobile phone, the spokesperson said.

Georgiou had been forgoing flushing since a metal detector alerted prison staff to the contraband on February 11, following sightings of the prisoner using the phone in his cell.

Authorities were previously thwarted from confirming the presence of the contraband device as Georgiou had stopped eating, believing this would prevent him from passing.

'Today inmate Georgiou sat in the BOSS chair and no metal was detected. He has been moved to a segregation cell within the High Risk Management Correctional Centre.'

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Georgiou, who was convicted of killing three Bandido bikie gang members in 2003, has a history of social media activity in jail

'Georgiou will no doubt sleep a little more comfortably tonight. I'm delighted that he no longer has access to a mobile phone and will remain in isolation in Supermax,' Corrective Services minister David Elliot told Daily Telegraph.

Georgiou, who was convicted of killing three Bandido bikie gang members in 2003, has a history of social media activity in jail.

In 2010 it was revealed he was maintaining a Facebook page with more than 150 friends from his cell.

He posted a picture of himself working out and another of him in a white singlet. According to reports, he also penned posts praising his friends for giving him 'strength'.

The triple killer is currently located at Goulburn Supermax prison, where a metal detector alerted prison staff to the contraband on February 11

A number of prisoners in the New South Wales prison system have kept in touch with the outside world using technology recently

A number of prisoners in the New South Wales prison system have kept in touch with the outside world using technology recently.

Minimum security prisoner Beau Wiles posted several selfies of himself in his underwear for his girlfriend before briefly breaking free of prison last year.