The woman from Sydney's north was taken to Royal North Shore Hospital in a stable condition, the spokeswoman of New South Wales (NSW) Ambulance was quoted as saying in reports.
It is not known if the phone was plugged in to a charger at the time, she said, adding that the paramedics had responded to a number of shocks from mobile phone chargers this year.
Inspector John Brotherhood said it only took a small shock to interfere with your heart.
"Basically, if the jolt moves you, if it takes your breath away or if it's at all a cause for concern, you need to get it checked out," he said.
The incident comes a week after technology giant Apple announced it will launch an investigation into claims that an iPhone electrocuted a Chinese flight attendant who was making a call while charging her iphone.
(Also see: Chinese family says daughter got electrocuted while using iPhone)
NSW Ambulance attended 232 Triple Zero calls for electric shocks between January 1 and June 30 this year, reports said.
Get your daily dose of tech news, reviews, and insights, in under 80 characters on Gadgets 360 Turbo. Connect with fellow tech lovers on our Forum. Follow us on X, Facebook, WhatsApp, Threads and Google News for instant updates. Catch all the action on our YouTube channel.