O2 PAC Code: Keep Your Phone Number When Changing Networks

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

O2 PAC CodeIf you're leaving O2 and joining another network or if you're leaving another network in order to join O2, 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 O2 For Another Network

O2

If you're leaving O2 and joining another network, you can take your phone number with you.

Start by asking O2 to issue you with a PAC Code.

If you're a Pay Monthly customer on O2, you can request a PAC Code by calling 202 on your O2 handset. Alternatively, dial 0344 8090202 from any other phone.

Alternatively, if you're a Pay As You Go customer on O2, request a PAC Code by calling 4445 on your O2 Pay As You Go handset. You can also call 0344 8090222 from any other phone.

You can request a PAC Code over the phone at any time during O2's opening hours:

Monday - Friday8.00am - 9.00pm
Saturday8.00am - 8.00pm
Sunday8.00am - 6.00pm

It's always free to get a PAC Code from O2 (it's your legal entitlement). After getting your O2 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 O2 PAC Code

Your new network provider:

Joining O2 From Another Network

O2

If you're joining O2 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 O2.

After getting the PAC Code, you should order your new handset 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 »

Once Your New Phone Arrives...

Once your new phone or SIM card arrives from O2, 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 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).

Upgrading Your Plan On O2

O2
O2

If you're simply upgrading to a newer handset or tariff, it's not necessary to use an O2 PAC Code. You can simply upgrade via O2'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 O2 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 an O2 PAC Code or when transferring their phone number from another network to O2.

Like this tip? Get the most from your mobile phone...

  • Discover brand new ways to use your mobile phone
  • Techniques to get more out of your mobile phone for less
  • Be the first to learn about new mobile technology

Enter your email to receive free regular Ken's Tech Tips:

About Ken

Ken Lo

My passion is helping people to get the most out of their mobile phone. I've been blogging at Ken's Tech Tips since 2005.

Aside from writing about mobile technology, my interests are in software development, digital marketing and physics. Outside of the blog, I work with numerous technology companies helping them to explain their product and helping them to market it to consumers. Please get in touch for more information.

Your Comments

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 1166 comments about transferring a phone number, please see the main PAC Codes article.

  1. jan said:

    I’m in the process of trying to transfer my mobile number over from O2 to TPO and having a nightmare as my number seems to be lost somewhere in between and TPO have no clue as to what they are doing I am ringing them every day and getting nowhere there customer service is none existent and so I’m now stuck.

    jan transferred a phone number from O2 to TPO Mobile.

    1. Ken replied:

      Hi Jan,
      Sorry to hear about the problems you’ve had moving a phone number from O2 to TPO Mobile. In the case of a phone number transfer, it’s your new mobile network that is responsible for the switch. Therefore, you’ll need to liaise with TPO to resolve this. Without wanting to be the bearer of bad news, the general feedback I’ve had is pretty negative regarding TPO Customer Services. I’d therefore possibly recommend looking at an alternative network, if haven’t yet passed that stage of no return.
      Ken

  2. Yvonne said:

    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.

    1. Ken replied:

      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,
      Ken

  3. Matt said:

    Hi Ken I’m switching to Sky monthly from o2 PAYG and o2 are telling me they will charge me £15 for an unlock pin as phone only a few months old but have provided a pac code. Is thus allowed as I paid for phone outright?

    Matt transferred a phone number from O2 to Sky Mobile.

    1. Ken replied:

      Hi Matt,
      Thanks for your question about moving your phone number from O2 to Sky Mobile. With regards to O2 charging you £15 to unlock your handset, this is allowed and is O2 policy for customers who’ve had their handset for less than 12 months (their justification for this is you would have received the handset on a subsidised/discounted basis). The PAC Code, however, should always be free and you should never be charged for it.
      Hope this helps!
      Ken

Load more comments (142)

Leave a Reply

E-Mail Notifications: By default, I'll drop you an e-mail when there's a reply to your comment. If you don't want to receive such a notification, please select the "Don't Subscribe" option from the dropdown menu above.