Get Vodafone PAC code to keep number & switch to O2 network

Keep my Vodafone number

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

Contact Vodafone to request a PAC code and give notice to end your contract or account. Vodafone customer service can be reached by dialing 191 free from your Vodaphone mobile, or by calling 03333 040 191 from any other phone.

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

  • Vodafone will provide your PAC code (Porting Authorisation Code) either by SMS text message, email, over the phone if you contact them directly, or through an online Vodafone login.
  • 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 Vodafone account will remain active until your number has been ported over to your new O2 network. After the transfer is complete, your old Vodafone account will be automatically closed.

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

Got your Vodafone PAC code?

Provide your PAC code from Vodafone to O2 who will then be able to port your existing Vodafone 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 O2 your Vodafone PAC code, your old Vodafone billing account will be closed automatically when your mobile phone number is successfully ported over.

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

Transfer my number to O2

How to switch to O2 and keep my Vodafone number?

First get your O2 deal and activate your new SIM card.

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

  • Your old Vodafone mobile phone number that you want to keep.
  • The Vodafone 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 O2 SIM card activation.
  • You may also need the new O2 SIM card serial number found on the back as an additional security check.

Contact O2 customer services with your PAC code and let them know you wish to transfer your old number to O2. You can reach them either from your 02 mobile phone on 4445 for Pay As You Go, or 202 for Pay Monthly contracts.

If you are calling from a landline: dial 0344 8090222 for Pay As You Go customer Service or 0344 8090202 for Pay Monthly customer Service.

Alternatively, you can fill in the online O2 form and they will contact you when the transfer is complete.

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 O2 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.

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Compare O2 vs Vodafone

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

eSIM: Yes


About Vodafone

Vodafone is one of the worlds largest mobile phone network with a huge global brand and presence. It has among the highest network coverage in the UK and has pioneered the development of 4G and 3G services.

Vodafone 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

eSIM: Yes