The federal government has announced the fifth round of the Mobile Black Spot Program, with $80 million made available to rural communities across the country.
The state government will contribute an additional $3 million to reducing black spots across South Australia.
With around 500 black spots registered across the state, an Expression of Interest process is now underway to decide on priority locations.
Expressions of interest must include a demonstration of how the site will support regional economic growth, a minimum community contribution of $50,000 with clarity on who is providing the funding, and an outline of the coverage objective, including the location of the site.
State regional development minister Tim Whetstone said the expressions of interest gave regional communities the opportunity to "put themselves to the top of the priority list" as the government works with telecommunications companies to choose sites for new mobile phone towers.
"This way we can have a better understanding of the communities' coverage needs as well as improving each application's chances of success," Mr Whetstone said.