TalkTalk now has more than a million broadband customers signed up to its Fixed Low Price Plans.
In October last year, TalkTalk said it would seek to prevent customers experiencing "bill shock" by offering a guarantee that broadband prices would be fixed for 18 months.
The company then announced in January it was extending this proposition further, ensuring people with 12 or 24-month contracts will not see prices go up during this period.
According to TalkTalk's latest trading statement, this has proved a popular offer, with 1.3 million broadband customers on fixed-price plans by the end of Q2 2017.
The company also revealed that it added 20,000 customers between April and June this year, although revenues fell by 3.2 per cent.
This was attributed to a number of factors, including customers signing up to cheaper broadband deals and the fact its customer base is smaller than it was two years ago, when the firm fell victim to a cyber attack.