How to Move Your Business Mobile Network: A 2026 Guide for UK SMEs

Many business owners put off changing mobile networks because they assume the process is a headache. However, if you are stuck with a poor signal, an expensive plan, or subpar customer service, staying with your current provider is a commercial risk. The good news is that UK regulations have made switching simpler than ever.

In this guide, we will walk you through the entire process of moving your business mobiles. We will cover everything from using PAC codes to managing large-scale switches for multiple staff members. Whether you are currently with O2, Vodafone, EE, or Three, this step-by-step plan will ensure a smooth transition.

Why UK Small Businesses Choose to Switch

Most SMEs decide to move networks for one of five main reasons:

• Reducing Monthly Costs: This is the most common factor. Staying with the same network for years often leads to “loyalty price creep.” Moving can frequently cut your monthly outgoings by 20% to 50%.
• Solving Signal Problems: Signal strength is postcode-dependent. A network that works at your home might be useless at your new office. Switching allows you to move to a provider that actually offers bars in your workspace.
• Hardware Upgrades: If your team needs the latest hardware, you might find that a rival network offers much better financing or “inclusive” device deals.
• Expert Support: Generic consumer call centres often fail to understand business needs. SMEs often switch to work with specialists like The Business Hub, who provide dedicated account management.
• Simplifying Billing: If you have various SIMs on different dates and networks, moving them all to one provider makes your accounting much easier.

The Role of PAC Codes in Number Porting

A PAC (Porting Authorisation Code) is the 9-character key that allows you to take your existing mobile number to a new network.

Under Ofcom rules, getting this code is straightforward:

• Text for your code: Text the word ‘PAC’ to 65075. You should receive your code via text within a minute, along with details of any remaining contract fees.
• Call the network: You can request the code over the phone. They are required to give it to you immediately or via text within two hours.
• Use the portal: Most business portals now have a “Request PAC” button.

Once you give this code to your new network, they have one working day to complete the move. Your number stays the same; only the network changes.

What is a STAC Code?

If you want to close your old account and start fresh with a completely new number, you need a STAC (Service Termination Authorisation Code). You get this by texting ‘STAC’ to 75075. Most businesses avoid this as they want to keep their established contact numbers for clients.

The 8-Step Plan to Switch Your Business Network

1. The Mobile Audit

Before you speak to any new providers, list every number your business uses. Note down which network they are on, when the contracts end, and how much data they actually use. You might find you are paying for data that never gets used, or for lines belonging to former employees.

2. Check for Exit Fees

When you get your PAC code, the network will tell you your “Early Termination Charge.” If you have a few months left, it might still be cheaper to pay the fee and switch to a lower-priced plan immediately. We often help businesses do this “switch-and-save” calculation.

3. Test Local Coverage

Do not trust coverage maps blindly. Test the signal at your office and at the homes of your remote staff. If possible, buy a cheap Pay As You Go SIM for the network you are considering to see how it performs in the “real world.”

4. Compare the Market

Research what is available for businesses of your size. Look at:

• Total Cost: Include any upfront costs for phones.
• Data Needs: Do you need “unlimited,” or would a shared data pool be cheaper?
• Contract Terms: 12-month plans offer freedom, while 24-month plans usually offer lower monthly rates.

5. Secure Your PAC Codes

Once you have picked a new deal, get your PAC codes. Remember, they expire after 30 days, so do not get them until you are ready to place your order.

6. Place Your New Order

Give your new provider your PAC codes and the numbers you want to keep. They will handle the “behind the scenes” work with your old network. By law, the switch must happen within one business day of your chosen date.

7. Prepare Your Team

Make sure your staff have their new SIM cards and have backed up any data or contacts from their old phones. Let them know there might be a few minutes of downtime on the day the numbers move.

8. Final Testing

Once the new SIMs are active, check that you can make calls, send texts, and browse the web. Also, remember to set up a new voicemail greeting, as your old one will be deleted.

Moving Multiple Lines: Bulk Porting

If you are moving more than five lines, requesting individual PAC codes is a waste of time. Instead, you can use a Letter of Authority (LOA).

With an LOA, a specialist like The Business Hub acts on your behalf. We coordinate with both networks to move all your numbers at the same time. This is usually done mid-week to ensure that support is available if any technical hitches occur.

Leaving O2 or Three: What to Watch For

Leaving O2

O2 Business often uses “Split Billing.” You might have one contract for the phone and one for the airtime. When you use a PAC code, the airtime cancels, but you will still owe the remaining balance for the physical phone.

Leaving Three

Three is often chosen for its “Go Roam” features or unlimited data. If you are leaving Three, check your data usage first. Many businesses find they can move to a 20GB or 50GB plan on a different network and save a significant amount of money.

How to Avoid Downtime

For an SME, being unreachable is not an option. You can achieve a “zero-downtime” switch by using Dual-SIM or eSIM technology.

By setting up your new network as an “eSIM” while your old physical SIM is still in the phone, the number will simply hop from one “line” to the other. Most modern iPhones and Samsung Galaxy devices support this perfectly.

When is the Right Time to Switch?

Why Use The Business Hub?

Switching networks is a commercial decision, and having an expert on your side makes a difference. The Business Hub helps SMEs in several ways:

• Whole Market Access: We don’t just check one network; we check them all.
• Wholesale Rates: We access prices that networks do not offer directly to small businesses.
• Independent Advice: If O2 has the best signal for you but Vodafone is cheaper, we will tell you so you can make an informed choice.
• Support: We manage the entire switch from start to finish. You deal with us, and we deal with the network’s technical teams.

Common Mistakes to Avoid

• Focusing only on price: A cheap contract is a waste of money if you cannot make a call from your desk.
• Ignoring contract end dates: Set a reminder 90 days before your contract expires so you have time to shop around.
• Assuming 5G is everywhere: Check the actual 5G availability for your specific office postcode before paying for a 5G-premium plan.

Summary

Moving your business mobile network is a simple way to modernise your tech and cut your costs. With the right planning and a partner like The Business Hub, you can move your numbers with zero hassle and start saving immediately.

Related guide: Need just the porting code? See how to get a business PAC code.