TalkTalk has reported that it attracted 76,000 new fibre broadband customers during the six months to September 30th.
This helped its overall fibre base grow to 779,000 - 21 per cent of its overall broadband base.
However, the picture on a wider scale was more mixed. Indeed, TalkTalk's broadband base remained "broadly stable" throughout the six-month period, dropping slightly from 3.996 million to 3.967 million.
Figures also showed that while its retail base declined by 98,000 during the half, its wholesale base grew by 69,000.
Nevertheless, the data does suggest that TalkTalk is in the process of turning a corner after suffering a damaging data breach.
The company fell victim to a cyber attack in October last year, with a hacker obtaining the personal details of nearly 157,000 customers, including their names, addresses and dates of birth.
Last month, TalkTalk was handed a record £400,000 fine by the Information Commissioner's Office for security failings that enabled cyber hackers to steal customer data.
Commenting on its recent performance, Chief Executive Dido Harding said: "We have delivered an excellent uplift in first half profits and expect to deliver materially higher full-year profits than last year.
"One year on from the cyber attack, we have maintained a relentless focus on looking after our existing customers and keeping up the pace across a wide range of operational improvements to make TalkTalk simpler and better for customers."
This, she said, has led to significant year-on-year improvements in churn and customer satisfaction, with its Fixed Low Price Plans going down particularly well in recent weeks.
TalkTalk added that there is a "clear space in the market for a genuine value for money provider that offers simple, affordable, reliable and fair products".