Steps to Transfer Your Existing UK Mobile Number Using a PAC Code

Switching mobile networks sounds simple… until you realise you might lose your number. 

And suddenly it’s stress. 

Your number is tied to everything. 
Banking. 
WhatsApp. 
Logins. 
Group chats. 
That one food delivery account you’ve had for years. 

So yeah, the idea of losing it? Not ideal. 

Good news is, you don’t have to. 

In the UK, you can move your number from one network to another using something called a PAC code. It’s actually pretty quick, pretty painless, and once you’ve done it once, you’ll wonder why you ever thought it was complicated. 

Let’s walk through it properly so you don’t mess anything up. 

What Is a PAC Code (Keep It Simple) 

PAC stands for Porting Authorisation Code. 

It’s basically a code your current network gives you so you can move your number to a new provider. 

Think of it like a permission slip. 

Without it, your new network can’t transfer your number. 

With it, the whole process becomes smooth. 

User story: Jake, 29, London 

Jake thought switching networks meant losing his number. 

Found out about PAC codes and realised it’s literally just a code you send over. 

He switched the same day and kept his number. 

Man said, “I’ve been overthinking this for years.” 

When Should You Use a PAC Code? 

You use a PAC code when you want to: 

• Keep your current number  
• Switch to a new mobile network  
• Move to a better deal  

If you don’t care about keeping your number, you don’t need one. 

But let’s be real… most people do. 

Step 1: Get Your PAC Code 

This part is easy. 

In the UK, you can get your PAC code by texting: 

PAC to 65075 

You’ll receive: 

• Your PAC code  
• Info about your contract  
• Any early exit charges  

No phone calls. No awkward conversations with customer service. 

User story: Chloe, 26, Manchester 

Chloe thought she’d have to call her network and argue her way out. 

Sent one text instead and got her PAC code instantly. 

She was like, “that’s it?” 

Yep. That’s it. 

Step 2: Choose Your New Network 

Before using your PAC code, pick your new provider. 

Look for things like: 

• Better pricing  
• More data  
• No mid-contract price hikes  
• Flexible plans  

This is where people often switch to options like Talk Home Mobile, especially if they’re tired of contracts and rising prices. 

User story: Malik, 30, Birmingham 

Malik compared his old contract with a SIM-only plan. 

Same data. Lower price. No contract stress. 

Switched immediately. 

Step 3: Give Your PAC Code to Your New Network 

Once you’ve got your PAC code, you pass it to your new provider. 

You can usually do this: 

• During checkout  
• Through your account  
• Or via a quick form  

Your new network will handle the transfer. 

You don’t need to cancel your old SIM manually. 

Step 4: Wait for the Transfer 

This part is calm. 

Your number usually transfers within: 

• 1 working day  

During this time: 

• Your old SIM will stop working  
• Your new SIM will activate with your number  

There might be a short gap where your phone has no service. 

Nothing to stress about. 

User story: Priya, 28, Leeds 

Priya’s number switched the next day while she was at work. 

Her phone lost signal for about 20 minutes, then came back with her old number on the new network. 

Smooth transition. No chaos. 

Step 5: Pop in Your New SIM (Or Activate eSIM) 

Once the transfer is done: 

• Insert your new SIM  
• Or activate your eSIM  

Your number will now be live on your new network. 

That’s it. You’re done. 

What Happens to Your Old Contract? 

Once your number transfers: 

• Your old contract is automatically cancelled  

If you’re still within your contract period, you might have: 

• Early termination charges  

These are usually mentioned when you request your PAC code. 

User story: Ben, 31, London 

Ben checked his PAC details and saw he had a small exit fee. 

Still switched because he’d save more in the long run. 

Said it was worth it. 

Common Mistakes to Avoid 

Let’s save you some hassle. 

Avoid these: 

• Letting your PAC code expire (it lasts 30 days)  
• Giving the wrong PAC code  
• Cancelling your old SIM before the transfer  
• Not checking contract charges  

Keep it simple and you’ll be fine. 

Why People Are Switching More Than Ever 

Switching networks used to feel like a big deal. 

Now? It’s normal. 

People are: 

• Chasing better deals  
• Avoiding long contracts  
• Looking for flexible plans  

And PAC codes make the whole thing easy. 

Final Thoughts 

Transferring your number using a PAC code is way simpler than people think. 

No stress. 
No losing your number. 
No complicated steps. 

Just: 

Get the code. 
Give it to your new network. 
Wait a day. 

Done. 

If you’ve been holding off switching because you didn’t want to lose your number, you can relax. 

You’re sorted. 

Frequently Asked Questions