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Guide · UK trades

A second phone number for your business

Keeping work calls separate from personal ones lets you switch off at night and makes the number easy to hand over later. Here are the five main ways UK trades get a second number, and what to check before you choose.

On this page
  1. Why have a separate business number?
  2. What are the options?
  3. What should you check before you choose?
  4. Which option suits most trades?
  5. How do you stop missing calls on the new number?
  6. Can customers tell it's a business number?
  7. Key takeaways
  8. Questions
  9. Sources

The easiest way for a tradesperson to get a second business number is to add an eSIM or second SIM to a dual-SIM phone, so both numbers ring on one handset. Other options are a second phone, a VoIP or "virtual number" app, a landline-style 01, 02 or 03 number that forwards to your mobile, or a business mobile contract.

By the TradiesMate team · Facts checked 2 November 2026

Why have a separate business number?

Ask tradespeople and the same reason comes up: switching off. On r/ukelectricians, one sparky said they "Leave the work phone once I'm done for the day and at weekends" (Reddit, r/ukelectricians). Another, on Installer Online, put it more bluntly: "A woman ringing my phone on a Sunday evening is the reason I have two phone lines!" (Installer Online).

  • You can switch off. Send work calls to voicemail at night without missing calls from family.
  • It's easier to hand over. If you take on staff or sell the business, the number can go with it.
  • Cleaner records. Business calls and texts stay in one place.

What are the options?

1. Dual SIM or eSIM on your current phone

You keep one phone and add a business SIM or eSIM on any network. On iPhone, Dual SIM needs an iPhone XS, XS Max, XR or later. It works with a physical SIM plus an eSIM, and iPhone 13 or later can also use two eSIMs. You can label each plan, for example "Business" and "Personal", and both numbers can make and receive calls and texts. To use two different networks, the phone must be unlocked (Apple Support). Many Android phones support dual SIM too; check your model's settings.

On r/smallbusinessuk, one owner said adding an eSIM took "about a minute" (Reddit, r/smallbusinessuk).

Good for: sole traders who want one phone. Check: your phone supports dual SIM, and how to silence one line out of hours.

2. A second phone

A cheap handset with its own SIM. It's simple, and you can leave it in the van at the weekend. As one reply in the same r/smallbusinessuk thread put it, with one phone "I could never switch off the 'work' line and keep the personal open other than diverting it, but that doesn't divert messages / WhatsApp's / emails".

Good for: people who want a hard split. Downside: two phones to charge and carry.

3. A VoIP or virtual number app

An app gives you a second number that works over mobile data or Wi-Fi. Some include business hours, voicemail and team routing.

Good for: teams and people who move between phones. Check: call quality where you work (lofts and basements may lack data), whether customers can text the number, and the monthly cost.

4. A landline-style number that forwards to your mobile

A geographic 01 or 02 number, or a non-geographic 03 number, forwarded to your mobile. Ofcom says calls to 03 numbers "cost no more than a national rate call to an 01 or 02 number and must count towards any inclusive minutes" (Ofcom).

Good for: looking local and established. Check: whether customers can text it (not all landline-style numbers can receive texts), and the forwarding cost.

5. A business mobile contract

A business plan from a network, often with several lines on one bill. Good for: firms with several staff.

What should you check before you choose?

  1. Can customers text it? Some customers would rather text than call, and a number that can't receive texts loses them.
  2. Can you set business hours? So out-of-hours calls go to a voicemail that says when you'll call back. See our voicemail greeting examples. If customers WhatsApp you, set an away message too.
  3. What happens to missed calls? Divert to voicemail, another phone, or a service that texts the caller back. If diverts aren't working, see call divert not working.
  4. Can you keep the number? To move a UK mobile number to a new network, text PAC to 65075 for free and give the code to your new provider (Ofcom). Ask any virtual or VoIP provider how moving the number works before you sign up.
  5. Cost: monthly fee, call and text charges, forwarding charges.

Which option suits most trades?

For most sole traders, a business eSIM on a dual-SIM phone is the simplest. It costs the price of a SIM-only plan, both numbers can call and text, and you can silence the work line at night. As you grow, a VoIP app or a business plan makes it easier to share calls with a team.

How do you stop missing calls on the new number?

A second number helps you switch off, but it doesn't answer the phone. In a February 2026 r/smallbusinessuk thread, one owner listed "missed calls when I'm on-site, calls coming in at odd hours, and it's hard to separate 'work' from life" (Reddit, r/smallbusinessuk). Whichever option you choose, set up:

Customers don't always expect an instant answer. As a CIPHE guest blog puts it: "Most customers don't expect an instant response. What they want is clear communication" (CIPHE).

Can customers tell it's a business number?

Usually not. A mobile number or a local number looks like any other number to the person ringing it.

Key takeaways

  • A business eSIM on a dual-SIM phone is the simplest option for most sole traders.
  • On iPhone, Dual SIM needs an XS, XR or later, and two networks need an unlocked phone.
  • VoIP apps suit teams. Landline-style numbers look local but may not receive texts.
  • Calls to 03 numbers cost no more than a national-rate call to an 01 or 02 number.
  • Check texting, business hours, missed-call handling, number portability and cost.

Questions

Can I have two numbers on one phone?

Yes, if your phone supports dual SIM. On iPhone that's an XS, XS Max, XR or later.

Is a virtual number good for a tradesperson?

It can be, especially for teams. Check signal or data where you work and whether customers can text it.

Should I put a mobile or landline number on my van?

Either works. A local landline-style number can look established, but a mobile number customers can text is often more practical.

Can I keep my business number if I change network?

Yes for UK mobile numbers: text PAC to 65075 to get your switching code. For virtual or VoIP numbers, ask the provider before you sign up.

Sources

  • Apple Support, "Learn about Dual SIM with eSIM" (en-gb), checked 2 November 2026.
  • Ofcom, "What are 03 numbers?", checked 2 November 2026.
  • Ofcom, "Switching your mobile phone provider" (updated 25 August 2026), checked 2 November 2026.
  • Reddit r/smallbusinessuk and r/ukelectricians, Installer Online and CIPHE: tradespeople's comments on work numbers, read 2 November 2026.

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Last checked 2 November 2026.

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