How PAC Codes Work: Step-by-Step Guide to Switching Mobile Networks Without Losing Service

What Is a PAC Code and How Does It Look?

A PAC code (Porting Authorisation Code) is a free 9-character alphanumeric identifier that lets you keep your mobile number when switching networks. The pac code id typically follows a pattern of three letters followed by six numbers, such as ABC123456 or XYZ789012.^[2][5][7]

This system was introduced under Ofcom regulations to make switching simpler. Since July 2019, the Text-to-Switch service means you can get your PAC code instantly, and ports usually complete within 1-3 working days.^[1][2][5]

Step 1: Getting Your PAC Code (Takes Under a Minute)

Text PAC to 65075 from your current mobile for an immediate reply containing your code. You'll also receive details about any early exit fees if you're still in contract. To check your contract status separately, text INFO to 85075.^{[1][2][3][4][5]}

There's no charge for requesting a PAC code, and it remains valid for 30 days. If texting doesn't work, you can call your provider directly:^[4][5]

• EE: 150 (from EE) or 07953 966 250
• O2: 202 (from O2) or 0344 809 0202
• Vodafone: 191 (from Vodafone) or 03333 040 191
• Three: 333 (from Three) or 0333 338 1001
• Virgin Mobile: 789 (from Virgin) or 0345 600 0789
• Sky Mobile: 0330 041 2639

Important: Request your PAC code before signing with your new provider, but don't cancel your old contract yet.^[1]

Step 2: Providing Your PAC Code to the New Network

Give your PAC code to your new network during the signup process, either through their website, app, or over the phone. They'll coordinate with your old provider to initiate the number transfer.

You can start using your new SIM for data and services immediately, but calls and texts will still route through your old network until the porting process completes.^[5]

Step 3: Understanding Port Completion Timelines

When people ask how long does it take to port a number, the standard answer is 1-3 working days under Ofcom rules. In practice, most ports complete within one working day if submitted before 5:30pm.^[5]

You'll typically receive a text message confirming the exact switch time, with downtime usually lasting 20-60 minutes as your number transfers from the old network to the new one.^[2][5]

Common Delays That Catch People Out

Several factors can extend your switching timeline beyond the standard 1-3 days:

Weekend and holiday delays: No processing occurs on weekends or bank holidays. A Friday afternoon request might not complete until the following Tuesday.^[5]

Contract complications: If you're still in contract, early exit fees apply. Your old provider may delay the port if you owe money on your account.^[2][5]

Expired PAC codes: The 30-day validity limit is strict. If your code expires, you'll need to request a new one.^[4][5]

Peak periods: During busy periods like major deal launches, processing can take an extra day due to high volumes.^[2]

Timing Your Switch to Avoid Service Gaps

For the smoothest experience, request your PAC code on Monday to Wednesday morning, allowing the port to complete by Thursday. Keep your old SIM active after requesting the PAC until the transfer is confirmed.^[1][5]

Order your new SIM in advance and test the data coverage in your area. Back up any important contacts or two-factor authentication apps that use your phone number.^[2]

If you want to simplify this process, services like Join Lodo can handle the switching paperwork for you, comparing deals and managing the administrative side while you focus on other things.

After the port completes, your old account will automatically close if there's no outstanding balance. Make sure to pay any dues first to avoid complications.^[5]

Note: If you want a completely new number instead of keeping your current one, text STAC to 65075 rather than PAC.^[5]