From July 1, WA will increase its existing penalties by $600 to combat a rise in deaths related to driver distraction.
In 2019, nearly 12,000 motorists were caught using their mobile phones while driving, according to WA Police.
Under new legislation, drivers will be fined $1000 and lose four demerit points for texting, streaming videos, browsing the internet or checking social media while behind the wheel.
It is also understood to include "touching" a mobile phone while driving, which WA's Road Safety Commission defines as "resting on any part of the driver's body (eg lap)".
Authorities say the steep fines will send a strong message to drivers who intentionally engage in unsafe driving behaviour.
Motorists who use their mobiles when stopped at the traffic lights, or talk on the phone while holding the handset could be fined $500 dollars and handed three demerit points.
"Last year saw a 48 per cent increase in the number of people killed in inattention-related crashes on WA roads compared to the previous five-year average", Cameron said.
For more information, visit the Queensland Government website.
The news comes after NSW rolled out a similar technology that can capture clear photos of any driver in any lane in any weather conditions.
"The fine and loss of points alone shouldn't be the only deterrent for drivers".
Western Australia and Queensland have the steepest penalties for mobile phone use while driving than any other state or territory. "If the phone is not secured in a mounting, it can only be used to receive or terminate a phone call without touching it", the RSC website reads.
South Australian drivers caught using their mobile phone while behind the wheel will incur a $534 fine and three demerit points.
"We are still receiving multiple reports that some drivers are still running the risk and are using mobile phones while driving", he said.