Despite flashes of talent, Konstas' domestic form -- marked by erratic shot choices and a lack of consistent runs -- has intensified debate over Australia's opening options before the five-test series against England starts in Perth on November 21.
The New South Wales batter was bowled for 20 as he attempted to ramp Victoria paceman Cameron McClure in a one-day match on Monday, reviving concerns about his shot selection.
Smith, one of Australia's finest batters in history, said Konstas had time to work out his game but he would be glad to help if the five-test opener came to him for advice.
"My door's always open, my phone's always on," Smith told reporters in Sydney on Tuesday.
"Whenever he wants to chat batting, I love talking batting and I'm happy to help wherever I can."
While offering support, Smith stressed that young players must ultimately forge their own path as he had following a shaky start to his own career.
"Yeah, I assume he's talking to different people — he's got his batting coach that he works with, lots of experienced players that can share wisdom as well," Smith said.
Despite Konstas' recent struggles, Smith praised his natural ability against pace bowling.
"From what I've seen he's got so much time as a batter when he's facing fast bowling — that's something you can't really teach," Smith said.
"That's a good starting point. There are a few things he has to work on, but he's a bright talent as we've seen and he's got a bright future."