What's the difference between a PAC and a STAC code?

A PAC keeps your number when you switch; a STAC (text STAC to 75075) lets you switch and get a new number instead.

How long does switching mobile network take?

One working day once you give the PAC or STAC to your new network. You'll get a temporary service gap of a few hours at most.

Can I switch if I'm still in contract?

You can, but early exit fees usually apply. Check your contract end date first — switching in the last 30 days is normally fee-free.

How to Switch Mobile Network in the UK (PAC & STAC Codes)

Q: How do I get a PAC code?

Text PAC to 65075 from the number you want to keep. Your current network must send the code within a minute, and it's valid for 30 days.

Switching mobile network is one of the easiest switches you'll ever make: text one code, and your number moves the next working day. Here's exactly how it works.

The three steps

Text PAC to 65075 to keep your number, or STAC to 75075 for a new number.
Give the code to your new network when you sign up — online, in store or by phone.
Your old SIM stops and your new one starts the next working day. That's it.

Before you switch

Check your contract end date — leaving early usually means paying off the remaining months.
Compare coverage, not just price: check each network's coverage checker for your postcode.
Look at contract length: 30-day rolling SIMs cost a little more monthly but let you leave any time.
Keep your old SIM until the switch completes, in case anything needs confirming.

Never miss your next switch

Mobile contracts are exactly the kind of renewal that quietly gets expensive. Add yours to UK Bill Tracker — free — and you'll be reminded before the contract ends, with time to grab a PAC code and move to a cheaper deal.

Track your mobile contract free

Frequently asked questions

How do I get a PAC code?

Text PAC to 65075. Your network must reply within a minute; the code lasts 30 days.

How long does switching take?

One working day after you give the code to your new network.

How to switch mobile network in the UK