PAC codes: how to transfer your mobile number when switching networks

Transferring your number to a new network might sound daunting, but these days it’s actually an incredibly quick and easy process, and it’s one that all relies on PAC codes.

PAC stands for porting authorisation code, and it’s a nine-character long code consisting of both letters and numbers. This code is tied to your phone number and allows your new network to transfer your old number over.

It’s also a process that can be done almost entirely by text, and doesn’t require you to make a call or talk directly to the network you’re leaving – so you can avoid any sales pitches.

Step 1 - Request PAC Code from existing network

There are usually multiple ways to get your PAC code, depending on which network you’re with, but the simplest way – and one that works with every UK network – is to just text ‘PAC’ to 65075 from the number that you want to keep.

In some cases you’ll additionally need to send other information, such as your date of birth, but this varies from network to network, and if additional details are required then you should get a text response explaining what’s needed.

Either way, once done you should get your PAC code texted back to you either immediately, or within a couple of hours at most.

This is the approach that we’d always recommend using if you’re set on leaving your current network. It’s quick, simple, and avoids you having to sit on hold or deal with someone trying to convince you to stay. That said, if you’re open to staying with your current network then calling up and saying you’re thinking of leaving isn’t a bad idea, as they might make you an offer that’s too good to refuse.

Other than texting as explained above, the main ways to get your PAC code are to either ask your current network for it, or log into your account for your mobile network and find it there. But the exact methods vary from network to network, so we’ve highlighted the available options for each 5G network below.

Again though, texting ‘PAC’ to 65075 works for every network – these other options are just for if you don’t want to or can’t do that for whatever reason.

If you don’t want to text 65075 to get your PAC or are unable to for whatever reason, then there are other options. We’ve outlined them in the chart below.

Step 2 - Order new phone or SIM

The next thing to do is to order a new phone, or SIM contract, on the network you wish to join.

You will be given a temporary number, which will be replaced by your old number once you complete step 3 below. However, some networks allow you to give a PAC code on checkout, so watch out for that as it will save you having to undertake step 3 altogther.

Smarty SIM Deal

15GB Data

Unlimited Mins

Unlimited Texts

£7.00 a month

1 month contract

£7.00 a month

See Deal

Black FridayEU Roaming included

Three SIM Deal

30GB Data

Unlimited Mins

Unlimited Texts

£7.00 a month

12 month contract

£7.00 a month

See Deal

Black FridayThree+ Rewards

Three SIM Deal

40GB Data

Unlimited Mins

Unlimited Texts

£8.00 a month

12 month contract

£8.00 a month

See Deal

Black FridayThree+ Rewards

Step 3 - Give PAC Code to new network

Once you have a PAC code from your old network you need to give it to your new one (the one that you want to port your number to).

The process for this also varies from network to network, but generally requires filling in an online form. You can give your new network your PAC code once you’ve already received a new SIM card from them, but in many cases you can also do it while placing an order with them.

If you do the latter, then your new phone or SIM could potentially arrive with your old number ready to use on it, while if you wait, you’ll briefly have a temporary number until the transfer is complete. So you can save time by organising the transfer while placing your order, but it can sometimes be better to wait, in case you change your mind.

6. FAQs