Ed Richards, chief executive of Ofcom, said: "We want competition and choice to continue to grow, and we want consumers to benefit from these changes. Consumers need to be able to shop around with confidence. Extending these rules and our enforcement activity will protect consumers from inappropriate sales and marketing techniques."
The company expects that because of the growth of VoIP (voice over IP), further guidelines related to this will also be introduced.
Ofcom is also carrying out separate review of migrations, switching and mis-selling across services such as broadband and mobile to reveal whether a common approach to switching would benefit consumers. The results of this will be available later this year.