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 1,589 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 1589 comments about transferring a phone number, please see the main PAC Codes article.

  • I’ve got my PAC No from Vectone. I’m moving to GiffGaff – who seem good. The instructions say to check the GiffGaff SIM works. What does this mean ? Do I register the GiffGaff SIM & put money on it then put the SIM in my phone and see if I can phone out & receive calls ? Then change back to my Vectone SIM. Tell GiffGaff my PAC No. Wait till the Vectone SIM doesn’t work. Then put the GiffGaff SIM into the phone and the Vectone phone No will have transferred to GiffGaff & away I go.
    So 1. What exactly do I do to check the GiffGaff SIM works ?
    2. On the day of the transfer do I keep the Vectone SIM in the phone till the transfer to GiffGaff has completed and then swap the GiffGaff SIM in ? Thanks (it’s a while since I’ve done this!!!)

    Sally transferred a phone number from Vectone Mobile to giffgaff.

    • Hi Sally,
      Many thanks for your question. Yes, I’d put the giffgaff SIM card in your mobile phone and just make sure everything works correctly (e.g. that your mobile phone accepts the SIM card, that you’re able to get coverage where you live and make outgoing phone calls, etc). Once you’ve done that, you can give your PAC Code to giffgaff and move your phone number over (strictly speaking, it isn’t necessary to make sure your giffgaff SIM card actually works but I’d always recommend doing this whenever possible to avoid potential problems at a later date e.g. sometimes people forget to unlock their mobile phone, and are then left without a working SIM card until that problem is resolved).
      With regards to 2, yes, I would leave your Vectone Mobile SIM card in until the coverage disappears. You can then switch it for your giffgaff SIM card which will then have your phone number transferred to it.
      Hope this helps,

  • Wendy Jones said:


    Having bought a new phone and decided to change network, I thought I had successfully ported my number from Virgin on a 30 day rolling contract to Giffgaff. The new phone is working well on the Giffgaff network with my old number. The old phone, however, is still allowing me to use Facebook and other apps such as Google Maps. Phone calls, texting and WhatsApp don’t work. I am confused about this as I thought that once my number ported over, everything would stop working on my old phone. Do I still have internet access for the rest of the 30 day contract that I had with Virgin? Has my contract with Virgin definitely been cancelled? Any help gratefully appreciated.

    Wendy Jones transferred a phone number from Virgin Mobile to giffgaff.

    • Hi Wendy,
      Many thanks for getting in touch! Is your old phone (previously on Virgin Mobile) connected to wi-fi? Your old handset will still function fine and will allow you to access the internet over wi-fi without a functioning SIM card inside it (hence, the ability to use apps such as Facebook, etc). Of course, phone calls and text messages rely on you having a functioning SIM card so that’s why they’re no longer working after you transferred your phone number out. WhatsApp is a little bit of a special case – technically speaking, it doesn’t require you to have an active SIM card and works fine over wi-fi, but each phone number can only be registered to one phone (so it would have been deactivated on your old phone, when you set up and registered your number on your new phone).
      Hope this helps,

  • 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,

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