Get iD Mobile PAC code to keep my number & transfer to O2 network

Keep my iD Mobile number

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

Contact iD Mobile customer services by calling 7777 free from your iD Mobile phone or 0333 003 7777 from any other telephone to request your PAC code. Make sure you ask for the PAC before the end of any contract agreement.

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

  • iD Mobile 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 iD Mobile account will remain active until your number has been ported over to your new O2 network. After the transfer is complete, your old iD Mobile account will be automatically closed.

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

Got your iD Mobile PAC code?

Provide your PAC code from iD Mobile to O2 who will then be able to port your existing iD Mobile 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 iD Mobile PAC code, your old iD Mobile 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 O2

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

First get your O2 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 iD Mobile mobile phone number that you want to keep.
  • The iD Mobile 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.

...more info on O2

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Compare O2 vs iD Mobile

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


About iD Mobile

iD Mobile is a mobile virtual network operator (MVNO) operating in the UK as iD Mobile Limited, using the Three network. It is owned by Carphone Warehouse and was launched on 12 May 2015.

ID Mobile offer 1 month, 12 months and 24 months SIM only deals, as well as 24 month mobile phone (handset device + SIM) contracts, or Pay As You Go SIMs with no contracts or credit checks.

iD Mobile Network Features

2G Network Coverage: No

3G Network Coverage: Yes

4G Network Coverage: Yes

5G Network Coverage: Yes

WiFi Calling: Yes

4G Calling (VoLTE): Yes

Data Rollover: Yes

Tethering Allowed: Yes