The Coalition has promised more than $6 billion to improve internet broadband services for Australians if it is elected to government.

Finance spokesman Andrew Robb and communications spokesman Tony Smith have unveiled the plan in Canberra today as an alternative to Labor's National Broadband Network.

The major policy announcement was left to Mr Smith and Mr Robb as Opposition Leader Tony Abbott campaigned in Sydney today.

Under the plan, 97 per cent of homes would have access to networks which would deliver broadband at speeds of between 12 Mega bits per second (Mbps) and 100Mbps by 2016 through a combination of technologies.

The remaining 3 per cent of homes would be serviced by satellite services

Main points of the policy include:

$6.3b of investment to get a private sector network up and running

$6.3b of investment to get a private sector network up and running speeds of between 12Mbps and 100Mbps

speeds of between 12Mbps and 100Mbps another $2.75b to extend the fibre-optic network

another $2.75b to extend the fibre-optic network $750m to improve DSL services

$750m to improve DSL services $2b for improved rural regional and metropolitan wireless networks

Mr Smith said the Coalition's plan would deliver improved services quicker than the Government's plan to households that need improved speeds.

And he said it was both faster and more affordable.

"Labor's NBN risks tens of billions of taxpayer dollars," he said.

"The Coalition will deliver the new platform and structure to unleash competition and drive private sector deployment of faster broadband across a range of technologies."

Finance spokesman Andrew Robb says the plan will encourage competition.

"We will embrace and ensure Australia has choice and that the heavy-handed Government is not dictating their telecommunications options," he said.

Labor has pledged to spend $43 billion on a National Broadband Network, of which the Government would be a majority stakeholder.

The NBN would offer speeds of 100Mpbs through fibre-to-the-home technologies but questions have been raised over how many homes would want to pay for such a high speed.

The network has begun to be rolled out in Tasmania and is due to be completed by 2018.