Starlink operates a network of around 5,000 satellites, which orbit 350 miles above earth and beam down signals.
The technology will be used to carry calls, texts and data to mobile masts in areas where it's too difficult or costly to install fibre cables.
VMO2 said the deal, reached through parent company Telefonica, will help to tackle so-called signal "not-spots" that have blighted rural communities across the country.
VMO2 expects to complete the bulk of its upgrade plan on time.
The company is also looking at other applications for satellite technology, including providing coverage for emergency services and improving mobile connections at special events.
Jeanie York, chief technology officer at VMO2, said: "We're leaving no stone unturned when it comes to improving rural connectivity and are continuously looking for new ways to boost signal in remote areas.
"By constantly finding new ways to deliver for our customers, we are bringing reliable mobile coverage to rural communities faster and helping to close the UK’s digital divide."
BT is also in talks with Starlink to provide rural coverage. BT is currently testing Starlink equipment at its Adastral Park research centre near Ipswich. The tests are focused on ways of improving broadband connections, but the company is also exploring ways of improving mobile signals.