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.