Switch mobile provider to SIM only
If you've come to the end of your contract, but your phone is still working and you want to keep it, a SIM Only contract could be ideal.
You could save a lot of money, as you'll just be paying for calls and data rather than paying off a new handset.
Also, if you choose a one-year deal or even a one-month contract, it'll give you more flexibility.
Switch online without PAC code
If you don't want to keep your number, text one of two short codes to your provider (the other is for people who do want to keep their number).
Your provider will then text you straightaway with a cancellation code.
The unique switching code will be valid for 30 days.