Switching from T-Mobile to Orange? It's a straightforward process to keep your existing phone number.


Step 1: Obtain a PAC Code from T-Mobile

The first step is to contact T-Mobile to obtain your Porting Authorisation Code (PAC Code).

You can get a PAC Code from T-Mobile by calling 150 on your T-Mobile handset. Alternatively, dial 020 7362 0200 from any other phone.

You can request a PAC Code over the phone at any time during T-Mobile's opening hours:

Monday - Friday8.00am - 8.00pm
An extended service costing 50p/call is available between 8pm-10pm on weekdays.
Saturday8.00am - 6.00pm
An extended service costing 50p/call is available between 6pm-8pm on the weekend.
Sunday8.00am - 6.00pm
An extended service costing 50p/call is available between 6pm-8pm on the weekend.

Here are some key things to know:

  • A PAC Code is 9 digits long and follows the format ABC 123 456.
  • T-Mobile must provide a PAC code within 2 hours of your request. If they don't, they must provide a valid reason for why the PAC Code can't be issued. Your right to a PAC code is enshrined within clause 18 of Ofcom's "General Conditions of Entitlement".
  • Your PAC Code is valid for 30 days. If you don't use it during this time, the PAC code will expire and you'll need to request a new one.
  • You shouldn't close your account at T-Mobile: it'll end automatically when your phone number is transferred to Orange.

Step 2: Order your new phone or SIM card from Orange's website

You should now order your new phone or SIM card using the Orange website. Please select the type of tariff you're intending to move to:

For a full list of available tariffs and the latest Orange deals, please refer to this page on Orange's website.

Orange will assign you with a temporary phone number during the transition process. This will allow you to test out the service before you finally transfer your phone number to Orange.

Step 3: Give the PAC Code to Orange

Once your new phone or SIM card arrives from Orange, switch it on and make sure everything's working properly. If you need to return/replace the new phone or SIM card, please do this before the phone number transfer.

Once you're happy to continue with the phone number transfer, contact Orange and provide them with your PAC Code.

Your PAC Code should be entered on Orange's online form. You can also provide your PAC Code to Orange over the phone:

If you're joining Orange Pay Monthly, you can submit your PAC Code by calling 150 on your Orange handset. Alternatively, call 07973 100 150 from any other phone.

Alternatively, if you're joining Orange Pay As You Go, submit your PAC Code by calling 450 (07973 100 450 if you're calling from another network).

Providing your PAC Code to Orange
The PAC Code should be submitted through a form on Orange's website.


  • You must provide the PAC Code to Orange within 30 days of it being issued by T-Mobile. If the PAC Code has already expired, you'll need to return to step 1 and request a new PAC Code from T-Mobile.
  • T-Mobile Pay As You Go customers: Try to use up your remaining credit as it can't be transferred to Orange.

Step 4: Phone Number Transferred (Next Working Day)

As long as you've submitted your PAC Code to Orange before 5.30pm, your phone number transfer will normally be scheduled for the next working day (Monday to Friday only, excluding English bank holidays). After 5.30pm, you'll need to wait one extra working day for your number to be transferred.

On the day of the transfer, you'll momentarily lose coverage on both mobile networks. When this happens, restart your handset on Orange. You should find that the Orange phone or SIM card will now associated with your original phone number.

  • If you see an error message (e.g. "SIM card registration failed"), this means it's time to restart your phone.
  • Once the phone number has been transferred to Orange, your account on T-Mobile will automatically be closed. You'll receive a final bill from T-Mobile for any outstanding charges.

Get the Latest Deals from Orange →

Any Other Questions?

In case of any problems during the transfer of your phone number, you should contact your new mobile network (Orange) with details of the problem.

If you have any other questions on using a PAC Code, please see my in-depth guide to transferring your phone number between networks. You can also read comments from other visitors of this site.

← Full Article: "PAC Codes - How to transfer your mobile number when switching networks"

Your Comments 1,213 so far

We'd love to hear your comments on transferring a phone number from T-Mobile to Orange. The comments below are from people who've made the same transfer. You can add your own comments here.

To view all 1213 comments about transferring a phone number, please visit the main PAC Code article.

  • I think I may need to contact Orange customer support but just wanted to get some background in case.

    I have just switched from a T-mobile SIM only 30 day plan to an Orange pay monthly.

    I obtained the PAC from TM yesterday and gave it to Orange. I received a txt message from Orange on my OLD phone telling me that my settings had been updated and to turn my phone off and back on again this morning about 4am.

    Now, today, I can make outgoing calls and texts and the receipient gets my old number showing on their screens, however, incoming calls and messages are going to my old phone.

    The phone number that came with my Orange phone has been disconnected.

    Does this sound like the transfer is still in progress and I received the text too early? Or should I be concerned that there is a problem now?

    Any help, gratefully received.

    • Hi Alan,

      It sounds as if your phone number transfer might still be in progress? My recommendation is to restart your phone every couple of hours – if there’s still a problem by the end of the working day then you should get in touch with Orange Customer Services (dial 150 from your Orange handset). Fingers crossed everything will work properly – do keep us updated on the status of your transfer!


  • James Allanson said:

    I gave my PAC code to Orange two weeks ago, a week later nothing happened. Rang them up a week ago and was told that it would be sorted by midnight, got a text on my old sim card from T-Mobile (my old network) saying that it had started the process and would be done by the end of the day. A week later, and again nothing has happened. So I rang them this morning to be told there was something wrong with my PAC code, so I re-gave them the code and was told it would be done between 11am and 3pm. It's now 5 and a half hours after this time and still nothing.

    Why is it taking so long? And is this actually against the law (Ofcom) as I have seen on some forums that there is a set amount of days that the network has to transfer the number over?

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