Joining O2

If you’re switching to O2 from another network, and you want to keep your mobile number, you’ll need to ask your old network for a PAC (Porting Authorisation Code).

You can get your PAC by texting PAC to 65075, you’ll get it in 60 seconds. Alternatively, you can contact your current provider.

How do I use my PAC code?

You can give us your PAC code when you order your new O2 connection or at any time afterwards.

  • You can give us your PAC code online: Switch your number to O2.
  • Or call us on 202, free from your O2 phone, on 0344 809 0202 from any other phone, or visit an O2 store.

How long does it take to switch?

Once you’ve given us your PAC code you’ll switch to our network within one working day (Monday-Friday, 9am-5pm, excluding bank holidays). If we receive your code after 5pm, you’ll switch within two working days. If you provide your PAC code at the weekend, you’ll switch on the following Tuesday. You’ll also need to be in the UK on the day your number is set to switch over.

 

PAC codes are only valid for 30 days, but if yours expires, don’t worry – you can always request a new one.

 

Your PAC code should have been sent by text, however if you lose your PAC code you can contact your current network provider for it.

 

If you’ve already given O2 your PAC but receive a notification advising this has expired or been used, you’ll need to contact the network you want to leave and request a new one.


Leaving O2

We’re sorry you’re thinking of switching. We’re here if you’d like to discuss your options or hear about any offers – just give us a call on 202, free from your O2 phone.

Remember that if you’re on O2 Refresh, including our custom plans, you can change your phone or tariff whenever you like.

Find out more about Leaving O2.

How do I check if there’s anything to pay on my account?

If you’d like to know whether there’d be anything to pay if you switched, or what your credit balance is if you’re on Pay As You Go, you can get an estimate of any charges or credit by calling on 202, signing in to My O2, or texting INFO to 85075.

 

Depending on what type of plan you’re on, you may incur early termination charges. Find out more about whether this would affect your contract at Leaving O2.


How do I get a PAC or STAC code?

If you decide to switch to another network, you’ll need to request a PAC code if you want to keep your phone number, or a STAC code (Service Termination Authorisation Code) if you’d like a new number.

 

You can request your code by giving us a call on 202, signing in to My O2, or:

  • Texting PAC to 65075, for free, if you want to keep your phone number
  • Texting STAC to 75075, for free, if you don’t want to keep your phone number.

You should receive your PAC or STAC code within 60 seconds.

 

If you have multiple numbers on your account, or if you have an Apple Watch on a Pay Monthly plan, you won’t be able to us the text service. You’ll need to sign in to My O2, or give us a call to request your PAC or STAC code. If you want to switch more than 24 numbers at a time, we’ll be able to help you on the phone or you can make more than one request in My O2.

 

If you want a PAC code, you’ll need to be in the UK to request it. You’ll get it in 60 seconds.

 

Your PAC code should be retained in your text messages, however if you lose your PAC code you can also get it from My O2 or by giving us a call.

 

You can give the same PAC or STAC code to multiple networks, if you’re switching to more than one.


Switching from O2 Pay As You Go to Pay Monthly

 

If you switch from Pay As You Go to a Pay Monthly tariff, we will send you a new sim with a new phone number.

If you want to keep your original number, we can arrange this. You’ll need your new Pay Monthly phone number from your O2 confirmation email or sim pack.

  • You can fill in our online form: Switch your number to Pay Monthly.
  • Or call us on 202, free from your O2 phone, on 0344 809 0202 from any other phone, or visit an O2 store.
How long does it take to switch?

We’ll transfer your number within one working day (Monday-Friday, 9am-5pm, excluding bank holidays).

If we receive your code after 5pm, you’ll switch within two working days.


What can I expect when the switch happens?

On the day of the switch, your Pay As You Go sim will lose signal. When this happens, put your Pay Monthly sim in your phone. If you don’t have signal, switch your phone off and on every couple of hours until you get a signal. If you still don’t have signal by 6pm, get in touch with us.

 

Texts and picture messaging can take up to 24 hours to work after the switch.


What happens to my Pay As You Go balance?

If your Pay As You Go balance is under £350, it will be transferred to your Pay Monthly account when you receive your second bill.

 

If you’re entitled to a loyalty bonus, up to £550, we’ll add credit to your fourth bill.


Switching from O2 Pay Monthly to Pay As You Go

 

If you want to switch from a Pay Monthly to Pay As You Go, we can take care of moving your number and even arrange for your new Pay As You Go sim.

Get in touch by calling us on 202, free from your O2 phone, or on 0344 809 0202 from any other phone. We’ll do the rest.

Is there anything to pay on my device plan?

If you’re on O2 Refresh, you can only move to Pay As You Go once your Device Plan is paid.

 

If you’re not on O2 Refresh but still within your contract’s minimum term, you might need to pay a termination charge, and our Customer Service team can talk this through with you.

 

You’ll receive your final Pay Monthly bill 14 days after you move to Pay As You Go, and you’ll need to settle any outstanding balance.


Swapping your O2 sim

 

If you’re just changing or replacing your sim and want to move your mobile number across to your new sim, you can do this in My O2.

If you’re an O2 Business customer, please sign in to My O2 Business to swap your sim.

If you haven’t already got a replacement sim, you can request one by calling us on 202, starting a webchat, or visiting an O2 store.

How long does it take to swap?

Sim swaps can take up to 24 hours to complete.

 

Once you lose signal with your original sim, turn your device off and turn it back on. If you’re using a plastic sim, pop it in your device. Wait till you see your network appearing on your device.


Changed your mind?

If you’ve changed your mind about transferring your number, get in touch with us and we’ll be happy to help.

Give us a call

If you'd like to chat, give us a call on 202, free from your O2 phone, or 0344 809 0202 from a non-O2 phone.

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