Unlimited movies, TV, social media, games and music - download and stream as much as you want, when you want without the risk of being stung by hefty fees.

The latest telco wars are being fought over unlimited data plans for mobile phones, designed to put an end to bill shock.

9NEWS can exclusively reveal that Vodafone will tomorrow begin selling the country's first unlimited data mobile plans at three price points: $60, $80 and $100 a month.

The latest telco wars are being fought over unlimited data plans for mobile phones. (iStock)

It comes just a month after Optus dabbled in unlimited data, offering a specific plan to a limited number of customers only to withdraw it 24 hours later.

It's currently available but only to a select few customers.

Under the Vodafone deal, the $60-a-month plan gives users 40 gigabytes of data at the highest possible speed, followed by unlimited data at 1.5Mbps.

The $80 deal offers 70GB of data at the highest speeds before slowing down, while the $100 plan gives 120GB before reverting to slower downloads.

Vodafone will begin selling the country's first unlimited data mobile plans this week. (Getty)

"Bill shock with regards to data is a thing of the past," Vodafone's Ben McIntosh told 9NEWS.

Within hours, Telstra announced it would offer unlimited plans from Thursday.

Priced at $69 a month on a minimum 12-month plan, it comes with 40GB of data at uncapped speeds, then unlimited data at the standard speed of 1.5Mbps for the rest of the month.

You'll need to bring your own phone.

Analysts say the sector is in for a massive shake-up.

"This is the big telcos differentiating themselves from the smaller ones and taking a stranglehold on their customer base," Canstar's Simon Downes says.

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The trend in recent years has been to switch to the smaller carriers because they were cheaper but the big companies have been forced to take drastic moves and launch unlimited data.

But consumers have been warned to read the fine print because despite the offer of unlimited data, there is a cap on speed.

The most recent Mobile Consumer Survey by Deloitte found the number of Australians streaming TV and video and watching live TV on smart phones has tripled in the past year.

Vodafone claims its new plan offers enough data to stream every episode of Netflix hit show Stranger Things, every month. (AAP) (AAP)

But it's come at a big cost. Forty-three percent of consumers regularly exceed their data limits, spending almost $313 million a year on extra data.

Deloitte found there was some way to go to provide packages to keep up with consumer data demands.

Vodafone says its $80 plan with 60GB of fast data is enough to stream every episode of Stranger Things every single month on your phone.