Get O2 PAC code to keep my number & transfer to 1pMobile network

Keep my O2 number

How to get a PAC code from O2 & transfer my number to 1pMobile

Request your 02 PAC code from customer services by contacting them, either from your O2 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 O2 PAC code by text message and begin the porting process.

  • O2 will provide your PAC code (Porting Authorisation Code) either by SMS text message, via email, or over the phone if you contact them.
  • A PAC number 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 your new 1pMobile network. After the transfer is complete, your old O2 account will be automatically closed.

While you wait to get your O2 PAC code, find the best 1pMobile online offer for you. Many of these exclusive mobile phone deals are only available online, directly from the network providers listed here.

Got your O2 PAC code?

Provide your PAC code from O2 to 1pMobile who will then be able to port your existing O2 number. They will tell you what day the transfer is due to take place (usually within 48 hours).

Important: Do NOT cancel your SIM only or mobile contract before switching, otherwise you may lose your current phone number and be unable to port it over. Once you give 1pMobile your O2 PAC code, your old O2 billing account will be closed automatically when your mobile phone 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 by SMS text message before porting your number.

Transfer my number to 1pMobile

How to switch to 1pMobile and keep my O2 number?

First get your 1pMobile package and activate your new SIM card.

Once you have done that, get the following information ready to follow the step-by-step instructions:

  • Your old O2 mobile phone number that you want to keep.
  • The O2 PAC code (Porting Authorization Code) from your previous network.
  • The expiry date of the PAC number (valid for 30 days from the date of issue).
  • The temporary mobile number from your new 1pMobile SIM card activation.
  • You may also need the new 1pMobile SIM card serial number found on the back as an additional security check.

Log in to your 1pMobile account and activate your SIM if you haven't already.

You will be asked if you want to keep your number, and prompted to enter your PAC code from your previous mobile network provider.

You can then choose the day you would like to transfer your existing mobile phone number, providing at least two working days notice.

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 1pMobile signal on your mobile phone screen. This will indicate that the transfer is complete, and you can now use your old phone number in your new mobile network provider.

For more information and latest offers on mobile phone deals, visit 1pMobile online.

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Compare 1pMobile vs O2

About 1pMobile

1pMobile is a mobile virtual network operator (MVNO) running on the EE network, with a mission to provide low cost calls, texts and data without the need of lengthy contracts or bundles that can lead to additional charges.

As a pre-pay (PAYG) service, 1p Mobile offers a simple tariff of 1p per MB of data, 1p per SMS text messages to UK mobiles & landlines, and 1p per minute calls to UK landlines & mobile phones.

1pMobile Network Features

2G Network Coverage: Yes

3G Network Coverage: Yes

4G Network Coverage: Yes

5G Network Coverage: No

WiFi Calling: No

4G Calling (VoLTE): No

Data Rollover: No

Tethering Allowed: Yes


About O2

O2 is a mobile network operator and telecommunications services provider in the United Kingdom, under the company name of Telefonica UK Limited. The company was originally formed in 1985 as Cellnet by the BT Group and was one of the earliest mobile phone networks to launch in the UK, and later rebranded as O2 UK.

02 is one of the largest network operators in the UK and provides 2G, 3G, 4G and 5G services to millions of customers in the United Kingdom, as well as to other mobile virtual network operators (MVNO).

O2 Network Features

2G Network Coverage: Yes

3G Network Coverage: Yes

4G Network Coverage: Yes

5G Network Coverage: Yes

WiFi Calling: Yes

4G Calling (VoLTE): Yes

Data Rollover: No

Tethering Allowed: Yes