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You are here: Home / Save Money / How to switch mobile networks without losing your number or getting stung

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How to switch mobile networks without losing your number or getting stung

by Ricky Willis · updated 30 October 2025

When your mobile bill goes up again, it’s easy to feel stuck. But you’re not. Switching to a cheaper deal is quick, free, and you can keep your number too.

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Here’s how to move networks safely and save money in the process.

1. Get your PAC or STAC code

  • Text one of these to 65075 for free
  • PAC if you want to keep your number
  • STAC if you want a new number

You’ll get a reply within a minute with your code and any early exit fees. The code lasts for 30 days, so you’ve got time to look around.

2. Check if you’re still in contract

If your text says there’s a charge to leave, it means your contract hasn’t ended yet. You can still plan your move and set a reminder to switch when it’s finished. If you’re out of contract, you can switch straight away and start saving. Many people cut £10 to £20 a month from their bill by doing this.

3. Find your new deal

Here are some popular low-cost options to start with

  • SMARTY runs on the Three network with one-month rolling plans and no credit checks
  • Lebara uses Vodafone’s network and often has good deals for low data users
  • Giffgaff uses the O2 network and lets you change your plan every month
  • iD Mobile, VOXI, Tesco Mobile and Asda Mobile are also worth checking

Most deals include unlimited calls and texts, so focus on the data you need.

4. Apply your PAC code

Once you’ve chosen your new provider, sign up and give them your PAC code. They’ll move your number for you within one working day. You’ll get a text to say when the switch will happen. Your old SIM will stop working, and your new one will take over.

5. Watch out for hidden traps

Before you move, check these first

  • Early exit fees if you’re still in contract
  • If your phone is part of a bundle, you’ll need to keep paying for the handset
  • Some networks run credit checks for longer contracts, so if that’s a problem, stick to rolling monthly deals

6. Cancel your old direct debit

Once your number has moved and your final bill is paid, cancel your old direct debit so you’re not paying for two services.

Quick tip

If you’re switching because of the O2 price rise, text PAC to 65075 and get your code today. Then shop around for the best SIM deals and make the move.

  • About
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Ricky Willis
Ricky Willis
A little bit of everything at Skint Dad
Ricky Willis is the original Skint Dad. A money-making enthusiast, father, and husband to Naomi. He is always looking for unique ways to earn a little extra.
Ricky Willis
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Ricky and Naomi Willis

Ricky and Naomi Willis, founders and editors of the Skint Dad website.

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