Talk Talk's guarantee of no broadband price increases for the entirety of a contract has proved very popular with customers.
In October, TalkTalk said it would seek to prevent customers experiencing "bill shock" by offering Fix Low Price Plans, which mean broadband prices would be fixed for 18 months.
The provider then announced in January it is extending this proposition further, ensuring people with 12 or 24-month contracts will not see prices go up during this period.
This offer is available both to existing customers and to households that are considering switching to TalkTalk.
According to the latest figures from TalkTalk, more than 500,000 customers had switched to the new plans by December 31st 2016.
Following the introduction of 12 and 24-months in January, an additional 80,000 customers re-contracted.
Three-quarters of new customers have since chosen to fix their price for 24 months.
TalkTalk has described the response to the introduction of Fixed Low Price plans as "unprecedented" and said customers are "reaping the rewards".
"In a sector famed for mid-contract price rises, TalkTalk made an unquestionable return to its challenger roots last year by offering a new range of plans, which guarantee no broadband price increases for the entirety of the contract" the firm said.
"The company also became the first to reward loyalty by making all discounts and deals available to existing customers as well as new customers."
TalkTalk said both these propositions are unique on the broadband market and are not currently being offered by another other telecoms provider in Britain.
Furthermore, it noted that the move has helped to improve trust and confidence in the firm during the last four months.
TalkTalk has made a concerted effort to enhance the customer experience recently. For instance, it has invested an extra 200Gbps capacity in its core network to improve video streaming.
In addition, in March last year, it became the first telecoms provider to use voice biometric technology to enable customers to access their accounts over the phone.
The technology allows them to use their voice to prove their identity, which means they no longer have to provide personal details to demonstrate they are who they say they are.
"TalkTalk’s commitment to improving its business has resulted in a significant reduction in complaints, as reflected in the latest Ofcom data," the company added.
During the third quarter of 2016, TalkTalk was the subject of 19 complaints per 100,000 subscribers.
This is slightly better than the industry average of 20 complaints for every 100,000 customers and a big improvement on the previous quarter, when it was one of the most complained about providers.