Can I Switch Business Mobile Provider and Keep My Number?

Yes. In most cases, you can switch business mobile provider and keep your existing mobile number.

To keep your number, you need a Porting Authorisation Code (PAC) from your current provider. You then give this code to your new provider, who arranges the transfer.

For a single mobile number, you can normally start the process by texting PAC to 65075 from the number you want to keep.

Keeping your number can make switching much easier for your business. Customers, suppliers and staff can continue using the same contact details while you move to a new mobile plan.

Can a Business Keep Its Mobile Number When Switching Provider?

Yes. Moving an existing mobile number from one provider to another is called number porting.

Your phone number is transferred to the new network rather than replaced with a new one.

This can be important for a business because the number may already appear on:

Your website
Google Business Profile
Business cards
Email signatures
Customer records
Advertising
Invoices
Supplier accounts
Banking and security systems

Keeping the same number means you do not have to update all these details simply because you have changed mobile provider.

However, keeping your number does not mean that everything attached to your old contract will transfer. Your tariff, voicemail settings, data allowances, roaming features and other services may change.

How Do I Switch Business Mobile Provider and Keep My Number?

For a single mobile number, the process is usually straightforward.

Step 1: Check Your Current Business Mobile Contract

Before switching, check when your current contract ends.

Look for:

Contract end date
Early termination charges
Remaining handset payments
Notice requirements
Additional SIMs
Device agreements
Shared data plans
Other services linked to the account

You may be able to switch while still under contract, but charges could apply.

The cheapest-looking new plan may not save your business money if you have a large exit charge to pay.

Compare the total cost of switching, rather than looking only at the new monthly price.

Step 2: Compare Your New Business Mobile Options

Do not request a PAC simply because another provider advertises a lower monthly price.

First check whether the new service is right for the way your business works.

Compare:

What to compare	What to check
Monthly price	What will you actually pay each month?
Contract length	How long are you committed?
Data	Is there enough for your team?
Calls and texts	Are the allowances suitable?
Coverage	Does the network work where your staff need it?
Roaming	What happens when employees travel?
Handsets	Are phones included or separate?
Support	What help is available if something goes wrong?
Price changes	Can the monthly price change during the contract?
Exit costs	What would it cost to leave early?

For more help, read our guide to choosing a business mobile provider.

Step 3: Request Your PAC

If you are switching one mobile number and want to keep it, you can normally text:

PAC to 65075

Send the message from the mobile number you want to transfer.

You can also request a PAC from your current provider by phone or through your online account.

Your PAC is free.

It is normally valid for 30 days, so do not request it too early.

Your current provider should also give you important information about leaving your existing contract, including applicable early termination charges.

Step 4: Give the PAC to Your New Provider

Once you have chosen your new business mobile deal, give the PAC to your new provider.

The new provider then starts the number transfer.

You should not normally need to cancel the mobile number separately before the port.

In fact, cancelling too early can make the process more difficult.

Let the PAC process handle the transfer of the number.

Step 5: Wait for Your Number to Transfer

Once your new provider has received a valid PAC, the number should normally transfer within one working day.

Your new provider should tell you when the transfer is due to happen.

There may be a short period on the transfer day when calls, texts or mobile data are affected.

For a business-critical number, plan the transfer carefully so someone is available to check the service.

Step 6: Test the Number

Once the transfer is complete, do not assume everything is working correctly.

Test:

Incoming calls
Outgoing calls
SMS messages
Mobile data
Voicemail
Two-factor authentication codes
Banking verification messages
Business apps linked to the number

Try calling the transferred number from a different network if possible.

If something is not working, contact your new provider promptly.

How Long Does It Take to Transfer a Business Mobile Number?

Once your new provider has your valid PAC, the number should normally be transferred within one working day.

The whole process of changing provider may take longer because you may first need to:

Compare providers.
Agree your new contract.
Receive your new SIM or handset.
Request your PAC.
Arrange the transfer date.
Transfer the number.
Test the new service.

For businesses with several employees or mobile numbers, it can be sensible to plan the change as a small migration project rather than switching every line without preparation.

Can I Switch Several Business Mobile Numbers?

Yes, but the process is slightly different when a business account contains several numbers.

If you are switching two to 24 mobile numbers, you should request the PAC through your provider’s online account or by contacting the provider.

If you need to move more than 24 numbers at the same time, contact your existing provider. They should explain the process required for a larger business migration.

Before moving multiple numbers, create a simple list containing:

Mobile number
Employee or user
Current tariff
Contract end date
Handset
SIM or eSIM
PAC details
Planned port date
Business-critical services linked to the number

This reduces the risk of a number being missed during the move.

Should I Cancel My Old Business Mobile Contract First?

Generally, do not cancel the number before using your PAC.

Request the PAC and give it to your new provider.

Your new provider then arranges the transfer with your existing provider.

Cancelling the service first can make the switch more complicated.

There is some protection if a service has already been cancelled. A customer can generally request to keep their old number for up to one month after cancellation.

However, it is better to arrange the number transfer correctly before ending the service.

Can I Switch Provider While Still in Contract?

Yes, you may be able to switch before your minimum contract term has finished.

However, you could have charges to pay.

These may include:

Early termination charges
Remaining handset payments
Outstanding usage charges
Charges for other services on the account

Your provider should tell you about relevant charges when you request switching information.

For a single mobile line, you can also text:

INFO to 85075

This can help you check whether the number is still within its minimum contract period and whether charges may apply.

For a business account with several lines, check the details directly with your provider.

Do not assume every number has the same contract end date.

Will I Lose Mobile Service During the Switch?

There may be a short interruption while the number moves from one network to another.

For many businesses, this may cause little disruption.

However, even a short loss of service can matter if the mobile number is used for:

Sales calls
Customer support
Emergency contacts
Staff working remotely
Banking security
Account verification
Delivery notifications

If the number is important, arrange a backup contact method for the transfer day.

This could be another business mobile, your office number, email or another approved communication channel.

What Happens to My Old SIM?

Your old SIM should stop working once the number has been successfully transferred.

Your new SIM or eSIM will then use your existing business mobile number.

Do not throw away the old SIM before the transfer has completed and you have tested the new service.

Keeping both available during the switch can make troubleshooting easier.

Can I Keep My Existing Phone?

Often, yes.

If your current handset is compatible with the new network and is not tied to another agreement, you may be able to insert the new SIM or install an eSIM and continue using it.

This makes SIM-only business mobile deals worth considering if your existing phones still meet your needs.

Before switching, check:

Device compatibility
SIM size
eSIM support
4G and 5G support
Wi-Fi Calling
4G Calling
Remaining handset payments

A lower-cost SIM plan is not useful if your phone cannot support the services your team needs.

What Happens to My Contacts When I Switch?

Your mobile number and your contacts are different things.

Porting transfers your phone number. It does not automatically transfer everything stored on your old SIM or device.

Most modern smartphones store contacts in an Apple, Google, Microsoft or other cloud account, but you should check before switching.

Back up important business information before changing SIMs.

This should include contacts and any other business data that could be lost if a device needs to be reset or replaced.

What Else Might Not Transfer to the New Provider?

Keeping your number does not mean your entire mobile setup moves with it.

Check whether you need to reconfigure:

Voicemail
Call forwarding
Wi-Fi Calling
eSIM
Roaming settings
Spend controls
Shared data
Additional SIMs
Smartwatch plans
Mobile device management
Security and verification services

Ask your new provider what will and will not transfer before agreeing to the switch.

What Should a Business Check Before Switching Mobile Provider?

A successful switch is not just about keeping your number.

The new service needs to work for your business.

Coverage

Check coverage where your employees actually work.

That could include:

Your office
Employees’ homes
Customer sites
Warehouses
Shops
Construction sites
Regular travel routes

A cheaper mobile contract is poor value if staff regularly lose signal.

Data

Look at how much mobile data your team currently uses.

Do not automatically choose the largest allowance.

A business with mainly office-based staff may need much less mobile data than employees who work remotely or travel regularly.

Contract Length

Check how long the new agreement lasts.

A longer contract may offer a lower initial price but can reduce flexibility if your business changes.

Handsets

Decide whether you actually need new phones.

If your current devices work well, a SIM-only deal may be worth comparing with a handset contract.

Support

Ask what happens when something goes wrong.

Check:

Support hours
Contact methods
Business support options
Replacement SIM process
Lost or stolen phone procedures
Account management

Reliable support can be important when several employees depend on their mobiles for work.

Business Mobile Switching Checklist

Before moving to a new provider, use this checklist.

Before choosing a provider

Check your contract end date.
Check early termination charges.
Review remaining device payments.
Check your current mobile usage.
Test coverage from the new network.
Compare the total contract cost.
Review roaming requirements.
Check business support.

Before the number transfer

Back up important data.
Confirm which numbers are moving.
Receive your new SIMs or eSIM details.
Request your PAC.
Give the PAC to your new provider.
Confirm the port date.
Tell affected employees.
Prepare a backup contact method.

After the transfer

Test incoming calls.
Test outgoing calls.
Send and receive texts.
Test mobile data.
Check voicemail.
Test important verification messages.
Check your old provider’s final bill.

Is Switching Business Mobile Provider Worth It?

It can be, but price should not be the only reason to move.

Switching may make sense if your business needs:

Better network coverage
More suitable data allowances
Lower overall costs
New handsets
Better roaming
More flexible contracts
Better business support
Easier management of several mobile lines

The key is to compare the whole service.

A plan that costs slightly more may offer better value if it gives your staff stronger coverage, more useful features or better support.

Likewise, a cheaper plan can save money if you are currently paying for data or services your business does not use.

Compare Business Mobile Deals Before You Switch

Keeping your number means you can change provider without asking customers and suppliers to learn a new contact number.

But before moving, compare more than the headline monthly price.

Check coverage, data, contract length, handsets, support, roaming and the full cost of leaving your current agreement.

Business Quote can help you compare business mobile deals based on what your business needs.

FAQ

Can I switch business mobile provider and keep my number?

Yes. You can normally keep your existing business mobile number when moving to another UK provider. You need a PAC and give it to the provider you are joining.

How do I get a PAC for my business mobile?

For one mobile number, you can normally text PAC to 65075 from the number you want to keep. You can also request a PAC online or by contacting your current provider. Different procedures apply when transferring multiple numbers.

Does it cost money to transfer my mobile number?

You should not be directly charged for porting your mobile number. However, you may still have to pay early termination charges, outstanding bills or remaining handset costs.

How long is a PAC valid?

A PAC is normally valid for 30 days. If you do not use it within that time, you will need to request another one.

How long does it take to move my business mobile number?

Once your new provider has received a valid PAC, the number should normally be transferred within one working day.

Can I transfer several company mobile numbers?

Yes. Businesses can transfer multiple numbers. For two to 24 numbers, request the PAC online or by contacting your existing provider. For more than 24 numbers being moved together, speak directly to the provider about its bulk switching process.

Should I cancel my old contract before transferring my number?

Normally, no. Request your PAC and give it to your new provider so they can arrange the number transfer. Cancelling the number before starting the port can complicate the process.

Can I keep my number if I have already cancelled?

In most cases, you can still request to keep the number for up to one month after cancellation. Contact your previous provider as soon as possible to arrange the PAC.

Will my contacts transfer when I switch network?

Your phone number can transfer, but your contacts and other phone data are separate. Back up important business data before changing SIMs or devices.

Can I keep my old phone when changing business mobile provider?

Often, yes. If the handset is compatible with the new network, you may be able to continue using it with a new SIM or eSIM. Check compatibility and any outstanding handset agreement before switching.