Whether you're joining giffgaff or leaving for a different network, it's a straightforward process to keep your old phone number.

giffgaff PAC CodeIf you're leaving giffgaff and joining another network or if you're leaving another network in order to join giffgaff, it's easy to keep your old phone number. All you need to do is to request a PAC Code: it's totally free and the entire process of transferring your phone number should normally take no longer than one working day.

For detailed instructions, please choose the option that best applies to you:

Leaving giffgaff For Another Network


If you're leaving giffgaff and joining another network, you can take your phone number with you.

Start by asking giffgaff to issue you with a PAC Code. You can get a PAC Code from giffgaff by requesting one online at giffgaff.com. Alternatively, call or text 43431 to get your PAC Code.

It's always free to get a PAC Code from giffgaff (it's your legal entitlement). After getting your giffgaff PAC Code, you'll need to provide it to your new network operator. For detailed instructions, please select your new network operator from the dropdown menu below:

PAC Code Finder: How to use your giffgaff PAC Code

Your new network provider:

Joining giffgaff From Another Network


If you're joining giffgaff from another network, you should ask your old network to provide you with a PAC Code. The PAC Code will allow you to transfer your number to giffgaff.

After getting the PAC Code, you should order your new handset or SIM card directly from giffgaff's website. For more information, please select the type of tariff you're wanting to move to:

For a full list of the latest giffgaff deals, please see this page on giffgaff's website.

Get the Latest Deals from giffgaff →

Once Your New Phone Arrives...

Once your new phone or SIM card arrives from giffgaff, turn it on and make sure everything's working properly. If you need to return or change the new handset/SIM card, please do this before you transfer your phone number.

Once you're happy to continue with the transfer, your PAC Code should be entered on giffgaff's online form.

Providing your PAC Code to giffgaff
The PAC Code should be submitted through a form on giffgaff's website.

If your PAC Code is provided before 3.00pm, your phone number transfer will normally be scheduled for the next working day (Monday to Friday only, excluding English bank holidays). For PAC Codes submitted after the 3.00pm cut-off, you'll need to wait one extra working day for your number to be transferred.

Upgrading Your Plan On giffgaff


If you're simply upgrading to a newer handset or tariff, it's not necessary to use a giffgaff PAC Code. You can simply upgrade via giffgaff's website. For more information, please select the type of tariff you're planning to move to:

More Information

For more information, please see the giffgaff website. You can also read our full guide on using a PAC Code: there's frequently asked questions amongst other tips for transferring your phone number.

For discussion, please see the comments on this page. They show other people's experiences either when using a giffgaff PAC Code or when transferring their phone number from another network to giffgaff.

Your Comments 1,323 so far

We would love to hear your comments: either about using a giffgaff PAC Code or transferring your phone number from another network to giffgaff. The comments below are all from people who've done the same thing in the past. You can contribute by adding your own comments here.

To see all 1323 comments about transferring a phone number, please see the main PAC Codes article.

  • I have a sim only contract with 02 but want to move networks to Giffgaff and keep my number, because I’m on contract with 02 can they refuse to give me my Pac code by law

    Craig Haynes transferred a phone number from O2 to giffgaff.

    • Hi Craig,
      Many thanks for your comment. No, O2 isn’t allowed to refuse you a PAC Code – it’s your legal entitlement as described here. There would, however, be allowed to charge you an early exit fee if you end your contract early.
      Hope this helps,

  • Hi Ken,

    I am with giffgaff pay monthly all I want to do is transfer my number to a new phone I have purchased
    tried the forums but all assume I am leaving Giff gaff.
    Can you help me do this.


    Ann transferred a phone number within giffgaff.

    • Hi Ann,
      Many thanks for your comment. To be clear, I think you’re looking to stay on giffgaff but simply to change your handset for a newer model? If so, the easiest thing to do would probably be to just move your SIM card from one handset to another. If for some reason you aren’t able to do this (e.g. because you need a SIM card of a different size), you can order a new SIM card from giffgaff here. Once you have it, you can use the giffgaff SIM Swap service to move your service to the new SIM card.
      Hope this helps!

  • My contract with 02 runs out in a couple of weeks and I want to change to giffgaff. Do I have to wait until the last day of the contract in case I’m penalised or can I have it all set up now?

    Yvonne transferred a phone number from O2 to giffgaff.

    • Hi Yvonne,
      Many thanks for your comment. You can leave O2 at any time to move to giffgaff, but it’s worth noting there’ll be a 30-day notice on you telling O2 you’d like to leave. You’ll pay an early termination fee if you leave during the 30-day notice period or of course, if you leave during the period of your original contract.
      For this reason, I’d probably try to call O2 a couple of weeks before you intend to leave. You can request a PAC Code from them, which has 30-days validity, so you can then comfortably move over to giffgaff whenever you’re ready.
      Hope this helps,

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