Vodafone has signed up to Ofcom's voluntary code of practice as part of an effort to be more open and transparent with customers.
Earlier this year, the watchdog unveiled a voluntary code as part of an effort to ensure customers are given clearer and more accurate information on broadband speeds before they enter into a contract.
Signatories are also committed to making it easy for customers to exit a contract if broadband speeds fall below a minimum guaranteed level.
The move means new Vodafone customers and anyone who is upgrading their package will receive accurate minimum and maximum download speeds, rather than theoretical speeds.
If the minimum guaranteed download speed is not achieved, subscribers will then be free to leave 28 days after notifying the company.
The move comes shortly after Vodafone abolished line rental charges for new and upgrading fibre optic home broadband customers, which it hailed an "industry first" that makes its home broadband pricing structure more transparent and easier to understand.
This means subscribers will still receive a landline and be able to use it without having to pay for it.
Glafkos Persianis, Commercial Director at Vodafone UK, commented: "Having allowed customers to break free from broadband line rentals and try out our mobile network, we are now giving them greater transparency on home broadband speeds.
"Since we entered the market just over a year ago, we have pledged to make a difference by scrapping the outdated and often misleading practices, which have plagued this market. The days of promising theoretical 'up to' speeds are over."
Vodafone added that its decision to sign up to the code came after it completed a major investment programme to enhance and extend its business-grade fixed fibre network to exchanges that now pass over 24 million premises across the country.