Kylie Maree Monks, 33, was visited by a man she met on the internet who gave her the card and a list of movies he wanted her to download. His own modem was broken, he told her.

Monks burned countless movies as requested between November 2008 and February last year, transferring them to CDs for him to collect every couple of weeks.

She also used the card to make numerous phone calls and later admitted to being responsible for the bulk of the usage.

Aurora discovered the unauthorised use of the card - taken from inside an electricity meter - when it received a $193,187.43 Telstra bill.

Police were notified and quickly tracked down the offending mobile phone, searching the disability pensioner's home a month later.

Monks initially denied being responsible, telling police her mobile was used by other people and signing a statutory declaration to that effect.

But her story unravelled when police found a second mobile in her possession that contained phone numbers that had been called using the stolen sim card.

They also found her laptop, which had used the SIM card to connect to the internet.

The internet usage history also showed interactions with Monks's Facebook friends.

She was arrested and soon admitted to previously lying about her involvement, telling police she destroyed the SIM card in February when she realised it did not belong to the man who gave it to her. She went on to plead guilty to counts of receiving stolen property, computer-related fraud and making a false declaration.

In sentencing her in Hobart yesterday, Justice Shan Tennent said that while she accepted the socially isolated woman "was, perhaps, initially gullible", she then took advantage of the situation.

The judge made a compensation order in favour of Aurora and jailed Monks for 18 months, suspending 12 months of the term on the condition Monks be of good behaviour for three years.