Keep your number when you switch: PAC and STAC codes
You can move to a new mobile provider and keep your number with one free text. These steps follow Ofcom's rules for switching.
Switch and keep your number in 4 steps
- Check your contract. Text INFO to 85075 to see whether you're still in contract. If you are, you might have to pay an early termination charge to leave.
- Get your PAC code. Text PAC to 65075. Your provider must reply within one minute, and tell you about any early termination charges or pay-as-you-go credit. The code is valid for 30 days.
- Give the PAC to your new provider. You can usually do this when you sign up, or sign up first and give it later, before it expires.
- Your number moves. Your new provider must complete the switch within one working day.
Don't want to keep your number?
Text STAC to 75075. The switch is then done for you, without notice period charges or paying for your old and new contract at the same time.
Good to know
- If you have more than one number on your account (for example a family plan), request your code by calling your provider or on its website instead.
- Your old provider must not charge for any notice period after the switching date.
- Providers may need to compensate you if the switch is delayed or you're without service for more than one working day.
- Cancelled already? In most cases you can still move your number within one month of cancelling.
- Providers can't sell locked phones, so your current phone should work with your new SIM. You may need to swap in the new provider's SIM card.
Want it step by step? Use our switch guide, or pick a plan first from every SIM-only deal we've checked.
Sources
- Ofcom: Switching mobile phone provider (last updated 25 Aug 2026) (checked 28 Oct 2026)
Questions people ask
How do I get a PAC code?
Text PAC to 65075 from the phone you want to move. It's free, and your provider must reply within one minute.
What is a STAC code?
A Service Termination Authorisation Code. Text STAC to 75075 if you're leaving but don't want to keep your number.
How long does a PAC code last?
30 days. Give it to your new provider before it expires.
How long does switching take?
Your new provider must complete the switch within one working day, and any loss of service must not last longer than one working day.
Will I pay for two contracts at once?
No. Your old provider must not charge you for any notice period after the switching date.
Can I keep my number after cancelling?
In most cases, yes, within one month of cancelling. Ask your old provider for a PAC by phone or on its website.