How to choose a business phone system in the UK

I've sold and installed business phone systems since 2012, and I run circle.cloud, the UK telecoms company I started in 2015 that installs and supports phone systems for small businesses. When I compare options, I start with how people work: who answers, where they are, and what happens when a call is missed.

To choose a business phone system in the UK, I'd answer those questions before comparing products. Add the number of users, call volume, data requirements and the full contract cost to the list. A feature table is easier to judge once you know what your business needs it to do.

How many people are actually on the phone, and how often

Start by listing who needs an account and what each person will use it for. Someone who rarely calls out may still need a business number or access to team messages. A five-person consultancy taking occasional client calls has different requirements from an agency with several people handling calls all day.

Then look at busy periods: a Monday morning rush, a launch week or a renewals period. Ask how many calls can arrive at once, who can answer them, and how any shared call allowance works.

Do you still need a desk phone

A receptionist at a fixed desk may prefer a handset with physical buttons. A colleague moving between sites may need a mobile app, while someone working from home may prefer a laptop and headset. List those needs before comparing providers, then check the supported devices, any setup work and the cost of supplying them.

What's actually slowing your team down right now

Write down a few specific problems you want the new setup to solve. It might be a client calling a personal mobile while its owner is away, a missed call nobody follows up, or a message that never reaches the person who needs it.

Use those examples in the trial. Check whether a colleague can pick up the conversation, find the relevant message and see who has already called back. Those are useful tests alongside a feature list.

Can you keep your number, and where does the data go

If you've got an existing business number, on your website, on the van, saved in customers' phones, ask every provider on your shortlist whether they can port it in, and what that actually involves. Porting a UK business number is routine, but "routine" still means checking account details, notice periods and whether your broadband is tied to the same line before you request the move.

Ask where recordings, transcripts and summaries are processed, which organisations can access them, and how long they're kept. UK data residency is one part of that discussion. Where personal data is sent or made accessible to a separate organisation outside the UK, the ICO's international-transfer guidance explains when additional rules apply.

Settle your call-recording policy before turning recording on, including your purpose, lawful basis, how you'll tell people and who can access the recordings.

What's the real contract, and can you try it first

Ask what's included in the per-user price and what gets added on: call recording, transcription, extra numbers and porting fees. Check minimum user counts, contract length and what happens if you need to drop seats. A twelve-month minimum on five seats is a different commitment to a monthly plan on the same five seats, even if the sticker price looks identical.

Then ask if you can try it before committing a full team. Use the trial to check calls on your actual devices and connection, messages between colleagues and the examples you wrote down earlier. Olatti, the platform we build, offers a seven-day trial with no card needed.

Where that leaves you

Before signing, I'd want a named user list, a device plan, written costs, answers about data handling and a completed trial using the team's own work. That gives you something concrete to compare between providers.

You can have a look at Olatti or try it for free (opens in a new tab) with your own team.