Prime Minister Malcolm Turnbull has said he is "keenly aware" of the pain and disappointment NBN installations are causing the public, but says the issues are related to marketing and customer service, not the network's technology itself.

"[NBN Co has] got to improve the installation experience. That's a people management, a process management issue. And they're getting on top of that", Mr Turnbull said in an interview with 3AW's Neil Mitchell, adding that complaints about poor installation experiences were one of the two areas causing the majority of the strife.

The second, he said, was that retail service providers were "not buying enough capacity" to deliver the speeds they are promising to consumers.

"People are being told by the telecom retailers that they're going to get speeds which are not being delivered at peak times. And we've got a number of changes to ensure that that problem doesn't continue", Mr Turnbull said.