Step-by-Step Guide to Switching to VoIP in the UK

By Olivia Johnson - Trusted UK Business Expert

Last Updated 10th of September 2026

4 minute read

Switching to VoIP can feel hard, but it does not have to be. Many UK businesses are moving to VoIP to save money and work better. This guide will show you each step in a simple way so you can switch with ease.

Switching to VoIP in the UK involves checking your internet, choosing a provider, picking equipment, porting your number, setting up users, testing the system, and training staff. A clear step-by-step process ensures a smooth and cost-effective transition.

There is more to know before you switch. We will walk you through each step, explain key choices, and help you avoid common mistakes. Keep reading to make your move to VoIP simple and stress-free.

Make Switching to VoIP easy and stress-free. Click the button below to explore your options, reduce costs, and set up your new VoIP system with confidence today.

Step-by-Step Guide to Switching to VoIP in the UK

VoIP stands for Voice over Internet Protocol. It lets you make calls using the internet instead of old phone lines. In the UK, many landlines are being phased out, so switching to VoIP is now very important.

This makes VoIP a popular alternative to traditional business phone systems.

This guide explains each step clearly so small and large businesses can follow it. It helps you plan, choose the right tools, and set up your system with confidence.

Step 1: Check Your Internet Connection

Your internet is the most important part of VoIP. Without a strong connection, calls may drop or sound poor.

You should check:

• Speed (at least 10 Mbps for small teams)
• Stability (no frequent drops)
• Upload and download balance

A fast and stable fibre broadband connection is best for modern business phone systems. If your internet is weak, upgrade before switching.

Step 2: Understand Your Business Needs

Before choosing a VoIP system, think about how your business works.

Ask yourself:

• How many users do you have?
• Do you need remote working?
• Do you need call recording or auto-attendant?
• Do you handle many customer calls?

Every business is different. A small shop may need basic calls, while a call centre needs advanced tools.

Step 3: Choose a VoIP Provider

There are many VoIP providers in the UK. Choosing the right one is key.

You should compare options carefully to find the best solution for your business.

Look for:

• Good customer support
• Clear pricing
• Strong reviews
• UK-based services
• Easy setup

Popular UK providers include:

• RingCentral
• 8×8
• Vonage
• BT Cloud Voice

Always compare at least three providers before deciding.

Step 4: Pick Your Equipment

VoIP can work with different devices.

This flexibility is one reason many businesses now prefer VoIP phone systems.

You can use:

• VoIP desk phones
• Computers (softphones)
• Mobile apps
• Headsets

Many businesses now use laptops and mobiles instead of desk phones. This makes remote work easy.

Step 5: Port Your Phone Number

You do not need to lose your old number. You can move it to VoIP. This is called number porting.

Steps include:

• Ask your provider to port your number
• Fill in a form
• Wait for approval

This may take a few days or weeks. Do not cancel your old service until porting is complete.

Step 6: Set Up Your VoIP System

Once your provider is ready, you can set up your system.

This includes:

• Adding users
• Setting extensions
• Creating call menus
• Setting voicemail

Most systems are cloud-based, so setup is simple and quick.

Step 7: Test Everything

Before going live, test your system.

Check:

• Call quality
• Internal calls
• External calls
• Voicemail
• Call routing

Fix any issues before your team starts using it.

Step 8: Train Your Team

Your team needs to know how to use the new system.

Keep training simple:

• Show how to make calls
• Explain new features
• Provide quick guides

A well-trained team will use VoIP better and avoid problems.

Step 9: Go Live and Monitor

Once ready, switch fully to VoIP.

After going live:

• Monitor call quality
• Ask for feedback
• Fix small issues early

This helps you get the best from your new system.

What Are the Benefits of Switching to VoIP?

VoIP offers many benefits for UK businesses. It is often cheaper than landlines and has more features.

Key benefits include:

VoIP helps businesses grow without high costs.

How Much Does It Cost to Switch to VoIP in the UK?

Costs can vary, but VoIP is often affordable.

Typical costs include:

• Monthly plans (£5–£25 per user)
• Equipment (optional)
• Setup fees (sometimes free)

Many providers offer free setup or deals. Over time, VoIP usually saves money compared to landlines.

Common Mistakes to Avoid When Switching

Many businesses make simple mistakes when switching.

Avoid these:

• Not checking internet speed
• Choosing the cheapest provider only
• Skipping training
• Not testing before going live

“A smooth switch to VoIP starts with good planning.”

Taking time to plan can save stress later.

Ready to switch to VoIP the easy way? Click the link below to find the best VoIP deals for your business today.

FAQ

What is VoIP in simple terms?

VoIP lets you make phone calls using the internet instead of a landline.

Is VoIP reliable in the UK?

Yes, with good internet, VoIP is very reliable and widely used.

Can I keep my old phone number?

Yes, you can transfer your number through a process called porting.

Do I need special equipment?

No, you can use computers or mobiles, but desk phones are optional.

How long does it take to switch to VoIP?

It can take a few days to a few weeks, depending on setup and number porting.

This step-by-step guide gives you everything you need to switch to VoIP in the UK with confidence. By following these simple steps, your business can save money, improve communication, and stay ready for the future.