Get BT Mobile PAC code to keep my number & transfer to T-Mobile network

Keep my BT Mobile number

How to get a PAC code from BT Mobile & transfer my number to T-Mobile

Contact BT Mobile to request your your PAC (Port Authorization Code) by dialing 150 from your BT Mobile or 0800 800 150 from another phone or +44 179 359 6931 from abroad.

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

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

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

Got your BT Mobile PAC code?

Provide your PAC code from BT Mobile to T-Mobile who will then be able to port your existing BT 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 T-Mobile your BT Mobile PAC code, your old BT 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 T-Mobile

How to switch to T-Mobile and keep my BT Mobile number?

First get your T-Mobile 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 BT Mobile mobile phone number that you want to keep.
  • The BT 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 T-Mobile SIM card activation.
  • You may also need the new T-Mobile SIM card serial number found on the back as an additional security check.

Call T-Mobile on 150 from your TMobile number, or on 0207 362 0200 from another phone and give them your PAC code from your previous network provider.

T Mobile will then confirm with you the switch date for when your original number will be automatically ported over to your new T-Mobile SIM.

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 T-Mobile 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 T-Mobile vs BT Mobile

About T-Mobile

T-Mobile UK is a mobile network operator in the United Kingdom, owned by Deutsche Telekom since 1999, and originally launched as One2One.

In 2009, Deutsche Telekom and Orange SA announced that the T-Mobile network was to be merged with Orange UK in a joint venture with EE Limited to form the UK's largest mobile network.

T-Mobile Network Features

2G Network Coverage: Yes

3G Network Coverage: Yes

4G Network Coverage: No

5G Network Coverage: No

WiFi Calling: No

4G Calling (VoLTE): No

Data Rollover: No

Tethering Allowed: No


About BT Mobile

BT Mobile is a mobile virtual network operator (MVNO) provided by BT Consumer and running on the EE network (which is now owned by BT Group following an acquisition that completed in January 2016).

BT Mobile is currently a SIM-only service, and operates alongside BT Business Mobile which is provided by the BT Business division.

BT Mobile 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