How to Transfer a Business Mobile Number (PAC Code Guide)

How to transfer a business mobile number to a new network using a PAC code in the UK — a step-by-step 2026 guide with zero downtime.

To transfer a business mobile number to a new network, text “PAC” to 65075 from each line to get a PAC code, give it to the new provider, and your number moves — usually within one working day with no downtime when timed correctly. The process is the same for business as consumer, but with multiple lines you need to coordinate. This guide walks through it step by step and covers the business-specific pitfalls.

What is a PAC code?

A PAC (Porting Authorisation Code) is a unique code that lets you keep your existing number when moving network. It’s free, valid for 30 days, and legally must be provided quickly. Each line has its own PAC, so a multi-line business needs one per number.

How to transfer your number, step by step

1. Get your PAC: text PAC to 65075 from each line, or request via your online account. You’ll receive the code and any early termination balance.
2. Check exit costs: if you’re mid-contract, confirm any early termination fee before proceeding.
3. Choose your new plan: arrange the new business contract or SIM-only deal and receive the new SIMs.
4. Give the PAC to the new provider: provide each PAC and the number it belongs to.
5. Confirm the switch date: the new provider schedules the port, usually the next working day.
6. Insert the new SIM: on the switch date your number moves to the new SIM; the old one stops working.
7. Verify each line: test calls, texts and data on every transferred line.

Coordinating multiple lines

For a business, the key is doing all lines together and timing the port for minimal disruption — ideally outside peak hours. Keep a list of numbers and their PACs, and confirm the new SIMs are labelled per user. A broker can manage a bulk port so nothing slips.

Pitfalls to avoid

• Don’t cancel your old contract first — porting handles closure of the number.
• Check early termination fees before you start if mid-term.
• Match each PAC to the correct number on multi-line ports.
• Time the port to avoid critical business hours.

How we compared

We manage business number ports across EE, Vodafone, O2 and Three for UK SMEs, including bulk multi-line transfers. This process reflects 2026 UK porting rules; we coordinate timing and confirm any exit costs before you switch.

Frequently Asked Questions

How do I get a PAC code for a business mobile?

Text PAC to 65075 from each line, or request it through your online account. You’ll receive the code plus any early termination balance.

How long does a number transfer take?

Usually one working day once the new provider has your PAC and schedules the port.

Will I lose service during the transfer?

No, when timed correctly — your number moves to the new SIM on the switch date with effectively no downtime.

Is a PAC code free?

Yes, PAC codes are free and valid for 30 days.

Can I transfer multiple business numbers at once?

Yes — each line needs its own PAC. Coordinating them together keeps disruption minimal; we can manage bulk ports.

Should I cancel my old contract before transferring?

No. Porting the number automatically closes the old line — cancelling first can cause problems.

What about early termination fees?

If you’re mid-contract, check any early termination fee before starting. Sometimes the savings outweigh the exit cost.

Can I keep my number if I change network?

Yes — that’s exactly what a PAC code is for. Your number stays the same on the new network.

Do I get a new SIM when I transfer?

Yes, the new provider sends new SIMs; your number activates on them on the switch date.

Can I port a number from a personal to a business account?

Yes, you can move a number into a business account using the PAC process.

What if a line doesn’t work after porting?

Test every line on the switch date; if one doesn’t activate, the new provider can resolve it quickly. We help chase any issues.