Set up business calling in the UK without any hardware

If you're starting from nothing, a new business, a team that's outgrown everyone using their own mobile, an office that's never had a proper line, most guides to setting up a business phone in the UK begin in the wrong place. They assume you already have a system and are choosing what to replace it with. Your question is simpler: how do you get business calling working at all, without an engineer, a cabinet in a cupboard, or a box of handsets you didn't ask for.

Here's the short version. To set up business calling in the UK with no hardware: pick a provider that runs on software, choose or port a number, decide how calls reach the right person, add each person as an account on their own laptop or mobile, then test the main number from an outside line before it goes on your website.

I know it works because that's how circle.cloud, the telecoms company I started in 2015 that installs and supports phone systems for UK small businesses, began: a desk, a phone and a working number, no PBX, no cabinet, nothing screwed to the wall. A business needs a working number and people who'll answer it. It doesn't need a rack.

Here's the setup, in order.

Decide what you actually need the number to do

Before you look at a single provider, work out the shape of the calling you need. It's a shorter list than it feels like.

• How many people need to be reachable directly, and how many just need to answer whichever call comes in next.
• Whether you're keeping a number you've already given out, or starting fresh.
• What kind of number looks right to your customers: a local 01/02 number, a national 03, or a Freephone 0800. If that's the part you're unsure about, we've written about whether a small business still needs a landline-style number.

Answer those three first and you won't buy more than you need.

Choose a provider that runs on software, not sockets

This is the decision that removes the hardware. The old shape of a business phone was a box on site, the PBX, with cabling run to a handset on every desk. A software-based provider keeps your number in their system and rings it on whatever your team is already carrying: laptop, mobile, tablet. Nobody comes out to wire a socket, because there isn't one.

I sold and installed the old shape from 2012, before I started circle.cloud, and nobody chose it. It came with the contract.

We've gone into running a business phone without desk phones separately, including the one place a physical handset still earns its keep: a reception desk that wants something to visibly pick up.

There's a deadline underneath this too. The analogue and ISDN lines the box-on-the-wall setup relied on are being retired, and Openreach's date is the end of January 2027. Start on software today and you don't do this move twice.

Get your number

Two paths, and neither involves waiting in for an engineer.

Starting fresh: pick a new number from your provider. It's usually live the same day you choose it, not the week after.

Bringing a number you already use: if you've been trading on a number, whether it's on an old landline or a mobile, you can port it across and keep it exactly as it is. Porting is a routine, regulated process in the UK, not a gamble. We've written the full walkthrough in keeping your number when you switch.

Either way, don't buy more numbers than you need yet. Adding a direct number for someone later is easy. Explaining to a customer why the number they've been calling has stopped answering is not.

Decide how a call finds the right person

This is the step new setups skip, and then they wonder why calls land with whoever's free rather than whoever should take them.

The simplest version, and the right starting point for most small teams, is one main number that reaches whoever's on, with a direct number only for the people who genuinely own a relationship: one person for new sales leads, another for existing accounts. We go through the trade-off in shared numbers versus individual numbers for a small team. Decide it before day one and nobody spends their first week wondering whose phone should be ringing.

Get everyone set up on day one, not week one

With nothing to provision, setting someone up is an account, not an installation. A new starter gets added, gets their number or their place on the shared line, and is reachable before lunch.

It works the same way in reverse. Someone leaving doesn't mean recovering a phone from them, it means removing their access and deciding where their calls go next. The number itself doesn't change.

Test it properly before you tell customers you're open

Give it an honest hour before this becomes the number on your website and your van.

• Call the main number from an outside line and check it reaches the right person or queue.
• Ring it when nobody's answering and listen to what happens. A voicemail nobody checks is worse than no voicemail at all.
• Make an outbound call and check the number your customer sees on their screen.
• If anything that isn't a phone hangs off an old line, a card machine, an alarm, a lift, give it its own connection. That's a landline-retirement job rather than a calling job, but rule it out now.

A decent business broadband line carries all of this without a second thought. If yours drops out, fix that before launch day, not after your first missed call.

What you shouldn't need to buy

No PBX cabinet, no bulk order of handsets, no structured cabling, no maintenance contract for a box in a cupboard nobody will open again. Leasing companies preferred hardware because more kit meant more finance and more commission, and I don't think that incentive has gone anywhere. If a provider's setup for a five-person team involves any of the above, it's solving a problem you no longer have.

A number and people, not a rack

That's the shape of a modern setup in general. It's also, deliberately, the shape of Olatti. Double-tap, type a colleague's name, press enter, and you're talking, from inside whatever you were already working in. Calls and messages live on the device someone's already holding, transcription runs on infrastructure we operate ourselves rather than a third-party AI vendor's, and there's nothing to install beyond the app.

Eleven years on from that first desk, the tools are better and the rule hasn't moved: a working number, and people who'll answer it. If you're setting this up from scratch and would rather never think about it again once it's done, join the Olatti waitlist and we'll have you calling from day one.