Porting your mobile number from O2 to TalkTalk Mobile

Leaving O2

How to switch from O2 and transfer my number to TalkTalk Mobile

Ask for your Port Authorisation Code (PAC) from O2 customer services by contacting them, either from your 02 mobile phone on 4445 for Pay As You Go, or 202 for Pay Monthly contracts. Alternatively from a landline: dial 0344 8090222 for Pay As You Go customer Service or 0344 8090202 for Pay Monthly customer Service.

If you wish to use the 'text-to-switch' service, simply SMS text PAC to 65075 free from your O2 SIM to get your PAC code by text and begin the porting process.

  • O2 will provide your Porting Authorisation Code (PAC) either over the phone, by SMS text message or via email.
  • A PAC code is valid for 30 days. If you don't use it within thirty days it will expire and you will need to request a new one.
  • Your O2 account will remain active until your number has been ported over to the new network. After the transfer is complete, your O2 account will be automatically closed.

Many of the exclusive mobile phone deals are only available online, directly from the network providers listed here. While you wait for your Port Authorization Code from O2, get the best TalkTalk Mobile offer tailored to you.

Finally, provide your PAC code to your new TalkTalk Mobile mobile network operator who will then be able to port your existing phone number from O2. They will tell you what day the transfer is due to take place (usually within 48 hours).

Important: Do NOT cancel your contract before switching, otherwise you may lose your existing phone number and be unable to port it over. Once you provide your new network provider with your PAC code, your old account will be clsoed automatically once the number is successfully ported over.

Note: Credit on Pre-Pay / PAYG (Pay-As-You-Go) accounts cannot be transferred over and so any remaining credit balance will be lost after the switch is complete. If you have any credit left, one good option is to donate it to a charity before porting your number.

Joining TalkTalk Mobile

How to switch to TalkTalk Mobile and keep my O2 number?

The first step is to select your TalkTalk Mobile deal and receive your new SIM card.

Once you have done that, ensure you have the following information ready:

  • Your original mobile phone number you want to keep.
  • The Porting Authorisation Code (PAC) from your previous O2 network.
  • The expiry date of the PAC number (valid for 30 days from the date of issue).
  • The temporary mobile number from your new TalkTalk Mobile sim card.
  • You may also need the new SIM card number found on the back.

Your TalkTalk mobile SIM card needs to be activated before you can transfer your existing number. Once your SIM is active, you can request the transfer from your online account or by telephoning TalkTalk customer service on 2883 from your TalkTalk Mobile or 0345 172 0088 from any other phone.

Note: You may lose network service for a short period on the day of transfer. If this happens, turn your phone off and on occasionally, until you see the TalkTalk Mobile signal on your mobile phone screen. This will indicate that the transfer is complete, and you can now use your existing phone number in your new mobile network provider.

For more information and latest offers on mobile phone deals, visit TalkTalk Mobile online

Compare TalkTalk Mobile vs O2

About TalkTalk Mobile

TalkTalk is a company which provides television, telecommunications, Internet access, and mobile network services to businesses and consumers in the United Kingdom.

Originally just a provider of fixed line telephony services to consumers, TalkTalk now offers fixed and mobile telephony and broadband services to consumers.

About O2

O2, the trading name of Telefónica Europe plc is a European broadband and mobile telephony company that originated as a collection of worldwide telecommunications companies, known in the later half of the 1990s as BT Wireless, and a global mobile data business known then as Genie Internet, both subsidiaries of British Telecommunications.