The Definitive PAC Code Guide: How to Switch Networks & Keep Your Number

Spotted a great SIM-only deal with more data, better coverage or a lower monthly cost—but worried about changing your number? Telling every contact and updating countless accounts is a hassle you don’t need.

Good news: UK rules from Ofcom make keeping your number quick and transparent. ‘Text-to-Switch’ (introduced July 2019) puts you in control—no retention calls, no fuss.

PAC Code: Quick Facts

• What it is: PAC = Porting Authorisation Code for keeping your number when you switch.
• How to get it: Text PAC to 65075 from the number you want to keep.
• Format & validity: 3 letters + 6 numbers (e.g. ABC123456); valid 30 days.
• Cost: Free to issue.
• Timing: Give your PAC to the new provider by 5pm Mon–Fri for a next working-day transfer.

Tap to text ‘PAC’ to 65075

Opens your SMS app and pre-fills "PAC" to 65075 (mobile only).

Your Simple 3-Step Guide to Switching Your Number

Switching your number now boils down to three straightforward steps.

💬 Step 1: Get Your PAC Code (The 60-Second Method)

The easiest way is the universal Text-to-Switch service.

To get your PAC code, text the word PAC to 65075.

You’ll receive an automated reply with your 9-character PAC code, any early termination or handset charges, and any remaining pay-as-you-go credit.

Other Ways to Get Your PAC (If You Can’t Text)

• Call your provider and request it over the phone (they should provide it immediately where possible, or follow up by text).
• You can request a PAC via your online account or by the network's app. They must supply it through these routes too.

🛒 Step 2: Choose Your New Plan and Provide Your PAC

First, use our SIM-only comparison to find the cheapest deal. If you’re after a handset, jump straight into Apple iPhone deals or Samsung Galaxy deals as a starting point. Then you have 2 options for providing the PAC:

• At checkout: Enter your PAC during sign-up when prompted.
• After you join: If you don’t have it to hand, add the PAC later in your new account/app once your SIM or eSIM is active.

Pro tip: Check coverage for where you live, work and commute using the official Ofcom coverage map.

⏳ Step 3: Sit Back and Let the Switch Happen

After you supply the PAC, your new provider handles the transfer.

Cut-off times: For a next working-day port, your new provider must receive the PAC before 5pm Mon–Fri. After 5pm or at weekends (and bank holidays), it rolls to the following working days.

On the Day of the Switch

1. Keep using your old SIM until it shows ‘No Service’.
2. Power off, insert your new SIM (or activate your eSIM), power on.
3. Your old number should now be active on the new network.

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PAC Code Alternatives: STAC and INFO

The Text-to-Switch system offers two other keywords for different scenarios. Using the right one is crucial.

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⚠️ Common Mistakes to Avoid When Switching

• Calling to cancel your old contract. Don’t - using a PAC triggers the cancellation correctly.
• Forgetting to save voicemails. Voicemail doesn’t transfer.
• Not checking if your phone is unlocked. Older devices may be locked to the old network.
• Submitting your PAC late on Friday. After 5pm Friday often means completion on Tuesday.

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Three Common PAC Myths

1. “Requesting a PAC cancels my service.” False - it only ends when your new provider uses the PAC.
2. “I’ll be charged a notice period after I switch.” No - providers can’t double-charge notice days once you’ve ported.
3. “I can’t keep my number if I already cancelled.” You can ask to keep it within one month of cancellation.

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Your Rights Under Ofcom’s Rules

• Request methods: Text 65075, online account/app, or by phone.
• Delivery speed: By phone, providers should give the PAC immediately (or by SMS within 2 hours if not possible); text/online within 2 working days.
• No fees: Providers cannot charge for issuing a PAC.
• Port timing: PAC received before 5pm on a weekday → next working-day switch.
• Multiple numbers: For 2–24 numbers, request PACs online or by phone; by phone they should be given immediately where possible (or by SMS within two hours), and online within two working days. For 24+ numbers, your provider will outline the process for bulk switching.
• Delays & compensation: If your switch is delayed beyond expected timeframes, you may be due reasonable compensation.
• No double-charging: Providers can’t charge notice-period days after your switch date.
• After cancellation: You can still ask to keep your old number within one month of cancelling.

See the official guidance for full details: Ofcom.

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Network-Specific PAC Code Information

Quick reference for major UK networks:

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