Mobile phone coverage is about to be boosted in the Mid North, South East and the Riverland.
The State Government's throwing $555,051 at four new Optus towers.
The base stations will go up at Wasleys, Sevenhill in the Clare Valley, Yahl near Mt Gambier and Blanchetown.
Wasleys has a high safety risk rating after blackspots impacted on communications during the Pinery Bushfire in 2015.
Around 2,100 residents, schools and businesses within a 10km radius of the towers will have increased 4G coverage.
They'll also get better reception for calls and faster, more reliable mobile internet.
The agreement was reached with Optus after the $2 million commitment from the State Government towards the Federal Government's Mobile Black Spot Program was not fully utilised.
These four sites in addition to the 20 currently under construction means more than 6,000 people will have better service.
It'll also benefit tourists, visitors and local businesses.