The government should use finance generated by next year's 4G spectrum auction to invest in rural broadband services, it has been claimed.
According to the Communication Workers Union (CWU), current funding arrangements are insufficient to deliver broadband to all areas of the UK and fall far short of investment in comparable developed countries.
It said that with Ofcom set to undertake the largest ever single auction of additional spectrum for UK mobile broadband services, the money earned could take the pressure off BBC funding cuts.
Under current coalition government plans, licence fee and digital switchover money will be channelled into improving the UK's national broadband infrastructure.
Andy Kerr, Deputy General Secretary at the CWU, said the union welcomed the sale of 4G spectrum but believes the government should invest its profits in super-fast broadband.
"The £830 million committed by government until 2017 is a long way short of what is needed to take superfast broadband to all homes and businesses across the UK," he stated.
"Early investment in universal broadband will pay dividends many times over so we urge swift action to put the UK at the head of the superfast broadband revolution."