Fixed on mobile
With a fixed number on your mobile, your business stays reachable on a professional number, wherever you are. Incoming calls to your business number arrive on your mobile phone via the Linphone app or direct forwarding over the mobile network. Customers simply call your business number and you answer—whether you are in the office, on the road, or working from home—without them noticing any difference.
For many UK businesses, sole traders, and freelancers, a fixed business number is essential because it combines the trusted impression of traditional landline telephony with the flexibility of mobile working.

Find your perfect number
Search instantly for available numbers worldwide.
Why businesses choose fixed on mobile
Discover how a fixed business number on your mobile keeps your team reachable, wherever you work.
Professional impression
A fixed business number builds more trust with customers and prospects than a mobile number, immediately enhancing your credibility. Choose from an 0800 freephone number, an 0345 national rate number, or a regional number like 020 (London) or 0161 (Manchester) that matches where your business operates.
Reachable everywhere
With a fixed number on your mobile, your business stays reachable even when no one is in the office, so you never miss a call from a customer or prospect because you are away from your desk or working from another location.
No expensive hardware needed
You do not need to install a traditional landline or maintain physical telephone equipment, allowing you to present yourself professionally at a low monthly cost with no upfront installation fees.
Manage it yourself via the dashboard
Voicemail, call forwarding, and opening hours are managed through your online dashboard, so you adjust your team's availability instantly without waiting for support.
How it works
You order an 0800, 0345, or regional number such as 020 or 0161, or transfer your existing fixed number using number portability so your customers continue calling the familiar number they already know.
After ordering, you set up in your dashboard how calls arrive: via the Linphone app on your smartphone or computer, or direct forwarding over the mobile network to one or more mobile phones. You set the call order, decide what happens when nobody answers, and switch between destinations without changing your number.
Within a few days your number is live and you are handling business calls from your smartphone, while customers see only your fixed number.
What sets our solution apart
Many providers offer an app designed for consumers with business needs, where you depend on that one app and a good internet connection. CallFactory specialises in business telephony and offers both the Linphone app and direct forwarding over the mobile network, so you choose per team member which method works best for their situation.
Install Linphone on your smartphone and on your Mac, Windows, or Linux computer, turning your desktop or laptop into a full business phone where you take and make business calls on your fixed number. At your desk you call via a headset on your computer, on the road you switch seamlessly to your mobile, and working from home you simply continue on the same business number without changing anything in your setup.
Beyond basic call forwarding, you have access to an interactive voice menu that automatically routes callers to the right department, call recording for training and evidence, voicemail-to-email and detailed real-time call analytics.
Through your online phone system you manage all settings yourself, from opening hours to call groups and from voicemail to forwarding options, so you decide how the caller is helped.
Which businesses benefit most
Fixed on mobile suits freelancers and consultants who want professional availability on their own business number without a physical landline. Small businesses without a dedicated office use it to project the same trusted image as established firms with premises and a reception.
Entrepreneurs who spend much time on the road ensure they never miss a customer or supplier because they are away from their desk. For teams working flexibly or hybrid, one shared business number on multiple mobile phones means the right person picks up without the caller needing to be transferred.
Everything at a glance
Available number types: 0800, 0345, 020, 0161 and other regional numbers, so you choose the number that fits your business and market.
Forwarding options: to a mobile number, a desk phone, a softphone or voicemail, in any order and with any fallback combination you need.
Extra features: interactive voice menu, call recording, real-time analytics and voicemail-to-email, so customers are guided to the right information quickly even outside office hours.
Technical requirements: no special equipment needed; any mobile phone works with the service, and the Linphone app also runs on Mac, Windows and Linux so your computer becomes a full business phone.
Management: 24/7 access to your online dashboard for all settings.
Powerful features included
Every Callfactory phone system comes loaded with intelligent features that give you greater control, flexibility, and peace of mind — right from day one.
API integrations
Tell us what you need, we build the endpoints. Our private API lets you integrate CallFactory telephony into your own software — no generic library, no guesswork, no wasted development time.
Calendar-based call routing
Automatically route calls based on your schedule. Office hours, rotating shifts, holidays, and on-call rosters — calls always reach the right person at the right time.
Call filter
Block unwanted callers, allow only authorised numbers, or reroute specific callers to different destinations. The call filter keeps your business lines open for the calls that matter.
Call forwarding
Forward incoming calls to any landline, mobile, or team. Set rules based on time and availability — manage everything from your dashboard.
Call insights
Track call performance with clear data, so you see straightaway from your dashboard who called, when, how long and where calls were routed.
Call notes
Capture every insight from every call. Add notes directly in your dashboard to keep follow-ups, customer requests, and action points in one place.
Call queue system
Every business has peak times when all lines are busy at once. The queue holds those callers with music or a message and connects them automatically to the next available team member, so you never …
Call recording
Automatically record incoming business calls, so you can listen through the dashboard, download them and use them for training, quality monitoring and compliance.
Change call destinations
Route calls to any device (mobile, landline, or VoIP), change destinations anytime from your dashboard, add as many extensions as you need, and route calls to colleagues worldwide.
Custom solutions
Our flexible IVR platform allows us to build powerful, custom solutions tailored to your business operations.
Custom telephony
Incident hotlines, automated order lines, SMS confirmations, self-service systems — if you can describe it, we can build it on our IVR platform.
Dedicated IVR servers
Your own IVR server with complete control. Build custom telephony applications, connect AI platforms, and scale from 4 to 200+ channels. The natural upgrade from our private API when you need more.
DenyList routing
Maintain a list of blocked telephone numbers that are automatically prevented from reaching your team. Request a block and it takes effect in seconds—temporarily or permanently.
File-based routing
Upload a CSV, TXT or JSON file to update call routing in bulk, changing hundreds of rules at once for PIN codes, allowlists, denylists, area codes or complete IVR flows.
GitHub routing
Manage call routing from your GitHub repository. Push a routing file, and CallFactory fetches, validates, and applies the changes automatically — with full version history and instant rollback.
International phone numbers
Get local phone numbers in other countries and route calls across borders. CallFactory is a registered telecom operator in 13 countries, delivering reliable international phone numbers without …
IVR toolkit
Build custom call flows with structured actions. Play audio, gather input, stream to AI, dial through, transfer and record—all developer-friendly and AI-ready.
Main phone number
One central national main phone number for all your offices and branches, where a voicebot asks the caller for postcode, product, or branch name and routes the call to the right location based on the …
Peak traffic management
Handle sudden call spikes from campaigns, media exposure, or seasonal peaks. Our cloud-based platform absorbs the volume so no caller hears a busy tone.
Phone menu (IVR)
Help callers reach the right person immediately. With a simple menu, you route every call to the right employee or department.
PIN code routing
Route calls based on a PIN code. Each PIN leads to a different destination — ideal for VIP clients, internal lines, restricted services, and multi-tenant setups.
Smart voicemail system
When no one picks up, callers leave a voicemail that arrives in your inbox as an audio file. Custom greetings, multiple recipients, and no extra software needed.
Star a call
Star a call helps you focus on the conversations that truly matter. With one click, important calls stand out.
Statistics by email
Receive daily, weekly, or monthly call reports directly in your inbox. See call volume, duration, peak times, and missed calls — without logging in to anything.
Text to speech assistant
Type your message, choose a voice and language, and it is ready in seconds. Professional voice messages for greetings, voicemail, queues, and menus—no recording equipment needed.
VIP whitelist
Restrict your business line to approved callers only. Only numbers on your whitelist get through — everyone else is blocked or sent to voicemail.
Voicebot
AI-powered voice assistants built on our IVR platform. Automate incoming calls with natural conversation, data lookups, and smart routing.
Webhook call routing
Route calls dynamically using your own webhook. When a call comes in, CallFactory asks your server where to send it — full control in real time.
Welcome message
Greet every caller with a professional message before the call is connected. Record your own, use a voice actor, or generate one in seconds with text-to-speech.
Whisper tone
A brief audio message tells you which number was dialled before you answer, so you immediately know whether this is a business call on your mobile, a specific webshop, or an international number.
FAQ fixed on mobile
Answers to the questions we hear most often about using a fixed number on your mobile phone with CallFactory.
No, they see only your fixed number and experience no difference from a traditional landline, so your professional image stays intact.
Yes, you link unlimited business numbers to your account and route each number to different phones or teams, so each department is reachable on its own number.
The call automatically goes to voicemail or to a colleague, depending on the fallback you set, with each business number keeping its own voicemail separate from your personal phone.
No, any mobile phone works with the service. You choose whether to receive calls via the Linphone app, which you install on both your smartphone and your Mac, Windows or Linux computer, or via direct forwarding over the mobile network.
Yes, number portability is available, so your existing fixed number transfers to our service smoothly without your customers needing to learn a new number.
