Mobile phone customers can now switch providers with a single free text under new rules which have come into effect.
At the moment, customers have to phone their mobile provider when they want to switch to a new firm.
They are then given a porting authorisation code (PAC) to give to a new provider if they want to keep the same phone number.
But watchdog Ofcom says the need to speak to a provider can be one of the main factors stopping people switching.
As part of this process, customers can often find themselves dealing with unwanted attempts by the companies to persuade them to stay.