Switching mobile phone providers generally means running the gauntlet of your current provider’s retentions team – who often try to browbeat you into staying. Ofcom legislation now means that individuals and businesses can switch providers swiftly without any discussion.
From July 1st (or before) users only need to text a toll-free service. By return they will receive a PAC code and details of any settlement charges due on the account (business users will receive this info within two business days). Once the PAC code is given to a new provider, the switch will take place within one working day.
Details can be found here.