The shape of the thing
Most business phone products are a phone system: a platform that replaces the phones your team uses, gives everyone a new identity on it, and charges for each of those identities every month. You install apps, you provision users, you administer it.
This is not that. It is one number, one menu, and a routing table. Your team keeps the phones they already own, on the mobile plans they already pay for, using the dialler that came with the handset. Nobody is provisioned, because there is nothing to provision them into. A call that arrives at your business number is asked one question and then sent to a real person's existing mobile as an ordinary incoming call.
The practical consequence: adding your whole crew costs nothing, because there are no seats to buy. The bill is the same for three people and thirty.
That constraint is the product. Everything below follows from it.
1. The number
You choose a local number in an area code you want to be seen in, or a toll-free number. Local usually wins for a business whose customers are local: a number in the area code where you work signals that you are nearby, which matters for trades, clinics and anything where somebody might reasonably want you to drive to them. Toll-free reads as national, and costs the caller nothing from a landline, which matters less than it used to now that mobile plans bundle minutes.
If you already advertise a number, you do not have to give it up. You can bring it with you, and the old line keeps carrying calls for the whole time the transfer is in progress, so nothing breaks while you wait. Number transfers are a regulated process with real timelines and real failure modes, and they deserve their own page: see porting your existing number.
If you have not decided what kind of number you want yet, our long-form guide to getting a business phone number compares eight option types with real pricing, and covers the identity documents and toll-free considerations that catch people out.
The business number is the only number a caller ever deals with. It is the number you put on the website, the invoice, the van and the Google Business Profile, and it is the number that shows up when your menu answers.
2. The greeting
You type what you want callers to hear and the voice is generated for you, or you record it yourself from your phone if you would rather callers heard an actual human. Either way you can change it whenever you like, which matters more than it sounds: the greeting is the one piece of your business that every single caller experiences, and being able to change it in a minute means you actually will.
A workable greeting does three things in about eight seconds. It confirms the caller reached the right business, so they stop wondering. It gives them the options in the order of how often they are needed, not in the order that flatters your org chart. And it stops. The most common mistake is a greeting that explains your opening hours, your website address and your mission statement to somebody who is standing in a flooded kitchen.
Say the option before the number, not after: "for a new job, press 1" rather than "press 1 for a new job". A caller who is half-listening remembers the thing they want and then hears which key to press. Reversed, they hear a number that means nothing yet and have to wait for the whole menu to loop.
3. The routing
Each menu option points at one or more mobiles. There are three patterns, and the choice between them is the only genuinely interesting decision in the setup.
One option, one mobile. The simplest. Option 3 is billing, billing is Dana, Dana's phone rings. Use it wherever there is exactly one right person and everybody knows who it is.
One option, several mobiles at once. Everyone's phone rings simultaneously and whoever is free answers first; the rest stop ringing. This is the right default for anything where the answer is "whoever can get to it" — a new job, a general enquiry, the front office.
One option, several mobiles in order. The first phone rings, and if nobody answers within a set time it moves to the next. Use it where there is a genuine hierarchy: the person who should normally take it, then their backup, then whoever is on call.
There is no limit on how many people sit on the receiving end, because nobody is billed per person. Sub-menus, a different schedule per option, ring groups and fallbacks are all included. Designing the menu goes through how to choose between these patterns, how many options to offer, and the specific mistakes that send callers in circles.
What happens after hours
You set a schedule, and outside those hours callers hear a different greeting. That second greeting can do something different with the call: send it to voicemail, send it to an emergency mobile, or send it to whoever is on call that week.
This is the part that most repays five minutes of thought. A plumber and an accountant want opposite things here. The accountant wants "we are closed, leave a message, we open at nine", because nothing that arrives at 11pm is urgent. The plumber wants "if this is an emergency, press 1", because the 11pm calls are the profitable ones. Weekends usually want their own answer again.
When nobody answers
If the call is not picked up, it takes a voicemail. The recording and a written transcript arrive in your inbox by email.
The transcript is the part that changes behaviour. A voicemail you have to dial in and listen to is a task; a transcript in your inbox is a message you have already read by the time you have finished looking at it, and you can forward it, search it and act on it from a phone in one hand while doing something else with the other. In practice it means missed calls stop disappearing.
What it does not do
Being explicit about this is more useful than another feature list, because the wrong purchase here is expensive and slow to unwind.
Nobody answers your phone for you. There is no call centre and no AI pretending to be your receptionist. The menu asks the caller what they need and then rings a real person on your team. If what you actually want is for somebody else to speak to your customers, take messages and book your appointments, you want an answering service, and you should buy one — see the comparison.
There are no queues, dashboards, call recording, CRM integrations or wallboards. If you need those you need a contact centre platform, which is a much larger and more expensive category, and you will be happier there than trying to make a small product carry the weight.
It does not change how your team makes outgoing calls. Everyone keeps dialling from their own mobile as they always have. That is what keeps the product simple and what keeps your team's emergency calling working exactly the way their carrier intends it to — a point with real regulatory substance behind it, covered on emergency calling.
Further reading
Longer research pieces on this topic, each with its own source list and a downloadable PDF.