Whether you're joining O2 or leaving for another network, it's a straightforward process to keep your existing phone number.

O2 PAC CodeIf you're leaving O2 to join another network, or if you're leaving another network in order to join O2, it's super easy to keep your current phone number.

All you'll 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 O2 For Another Network

O2

If you're leaving O2 to join another mobile network, you can take your phone number with you using a PAC Code from O2.

There are three ways to request an O2 PAC Code:

  1. Online: You can get a PAC Code from O2 by logging in to the My O2 website. Once you've logged in, go to My details > Thinking of switching from O2?.
  2. By Text Message: You can get an O2 PAC Code sent to you via SMS text message. Text PAC to 65075 to receive a PAC Code from O2.
  3. By Phone: You can get a PAC Code by calling O2. To do this, call them on:
    • For O2 Pay Monthly, dial 202 (or 0344 8090202 from any other phone)
    • For O2 Pay As You Go, dial 4445 (or 0344 8090222 from any other phone)
    You'll need to call during O2's opening hours (Monday-Friday 8am-9pm, Saturday 8am-8pm, Sunday 8am-6pm).

It's always free to get a PAC Code from O2, and it's your legal entitlement to be able to recieve one. If any cancellation fees apply to your O2 contract, they should also tell you what this will be at the same time as sending you a PAC Code.

The PAC Code you recieve from O2 should begin with TEL and should be 9 digits long (e.g. TEL 123 456).

Once you have your O2 PAC Code, you'll need to provide it to your new mobile network operator. For detailed instructions, please select your new mobile network from the following dropdown menu:

PAC Code Finder: How to use your O2 PAC Code

Your new mobile network:

Don’t want to keep your O2 phone number? You can request a STAC Code from O2 instead.

O2 STAC Code (Leave O2 Without Keeping Your Number)

If you’d like to leave O2 without keeping your current phone number, you’ll need to request an O2 STAC Code rather than a PAC Code. There are three ways to get a STAC Code from O2:

  1. Online: You can get a STAC Code from O2 by logging in to the My O2 website. After logging in, go to My details > Thinking of switching from O2?.
  2. By Text Message: You can get an O2 STAC Code sent to you via SMS text message. Text STAC to 75075 to receive a STAC Code from O2.
  3. By Phone: You can get a STAC Code by calling O2. Call them on:
    • For O2 Pay Monthly, dial 202 (or 0344 8090202 from any other phone)
    • For O2 Pay As You Go, dial 4445 (or 0344 8090222 from any other phone)
    You'll need to call during O2's opening hours (Monday-Friday 8am-9pm, Saturday 8am-8pm, Sunday 8am-6pm).

Once you’ve gotten your STAC Code, the rest of the process for joining your new mobile network remains the same. You can choose your new provider from the dropdown menu above for instructions on how to use your O2 STAC Code.

Joining O2 From Another Network

O2

If you're joining O2 from a different mobile network, you should ask your old mobile network to provide you with a PAC Code. The PAC Code will allow you to transfer your phone number to O2.

After getting a PAC Code from your old network, you should order your new phone or SIM card directly from O2's website. For more information, please select the type of tariff you're wanting to move to:

For a full list of the latest O2 deals, please see this page on O2's website.

Get the Latest Deals from O2 →

When Your New Phone Arrives...

Once your new phone or SIM card arrives from O2, switch it on and make sure everything's working correctly. If, for whatever reason, you need to return or change your handset or SIM card, it's best to do this before transferring your phone number.

Once you're happy to continue with the transfer, your PAC Code should be submitted through O2's online form. Alternatively, you can also provide your PAC Code to O2 over the phone:

If you're joining O2 Pay Monthly, you can submit your PAC Code by calling 202 on your O2 handset. Alternatively, call 0344 8090202 from any other phone.

If you're joining O2 Pay As You Go, submit your PAC Code by calling 4445 (0344 8090222 if you're calling from another network).

Providing your PAC Code to O2
The PAC Code should be submitted through a form on O2's website.

Once you've provided your PAC code to O2, your phone number transfer will normally be scheduled for the next working day (Monday to Friday only, excluding English bank holidays).

Sometimes, you’ll be given the option to provide a PAC Code at the same time as when you order your new phone or SIM card. We’d typically recommend against providing your PAC Code at this stage. Instead, waiting for the new phone or SIM card to arrive from O2 first will allow you to make sure it’s working correctly and will make the process of cancelling or returning much easier.

Upgrading Your Plan On O2

O2
O2

If you're simply upgrading to a newer handset or tariff, it's not necessary to get an O2 PAC Code. You can simply upgrade via O2's website. For more information, please select the type of O2 price plan you're planning to move to:

More Information

For more information, please see the O2 website. You can also read our full guide to using a PAC Code. This answers a lot of frequently asked questions and provides some additional tips on transferring your phone number.

For discussion, please see the comments below on this page. They show other people's experiences using an O2 PAC Code or moving their phone number from another network to O2.

Your Comments 1,681 so far

We would love to hear your comments: either about using an O2 PAC Code or transferring your phone number from another network to O2. 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 1681 comments about transferring a phone number, please see the main PAC Codes article.

  • Hi Ken,
    My phone contract with EE has ended and I have got a PAC code as I would like to take out a contract with O2 and keep my old number. I have found a very good deal on mobiles.co.uk for a pay monthly contract with O2 however I am unsure how I can use my PAC code and keep my number if I am not buying from O2 directly?
    Thanks for your help 🙂
    Beth

    Beth transferred a phone number from EE to O2.

  • Hi I am transferring from EE to O2 gave my pac code to O2 I am now using my number on O2 and EE some texts text are going to EE & Some to O2.
    It’s driving me mad what can I do?

    Roge transferred a phone number from EE to O2.

  • I have recently moved from EE to O2 and provided O2 with PAC code however O2 are refusing to transfer number as claiming contract been running for a couple of months and should have been completed within 30 days.
    Just checked all O2 terms and conditions and nowhere does it state this. Also EE researched and said that should not be the case. So still waiting for O2 to sort issue?? Poor service from O2, should have never left EE

    Misba transferred a phone number from EE to O2.

    • Hi Misba,
      Thanks for your comment, and sorry to hear about the issues using your PAC Code at O2. There shouldn’t be anything to stop you from using a PAC Code regardless of how many months you’ve already had your contract with O2 (i.e. it should be possible to use the PAC Code at any time). Were to able to get any further, getting O2 to accept your PAC Code?
      Ken

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