Voicemail remains one of the most important features on any business mobile. When you are in a meeting, on another call or simply out of reach, voicemail services ensure you never miss a message from a client, supplier or colleague. Yet despite being a standard feature on every UK mobile network, voicemail is often poorly configured — or not set up at all.
This guide covers everything UK businesses need to know about voicemail services: the voicemail numbers for every major network, how to set up voicemail on iPhone and Android, visual voicemail, voicemail-to-email, professional greeting tips, and how to make voicemail work harder for your business.
What Is Voicemail and How Does It Work?
Voicemail is a telephone messaging system that records voice messages from callers when you are unable to answer. On mobile networks, voicemail is a network-side service — the message is stored on your operator’s servers, not on your handset. When someone calls your mobile and you do not pick up, the call is automatically diverted to your voicemail number after a set number of rings (typically 15–25 seconds).
The caller hears a greeting — either a default network message or a personalised recording you have set up — and can leave a spoken message. You are then notified via an SMS, a push notification or a visual voicemail alert, depending on your phone and network.
For businesses, voicemail is the safety net that catches every call. A missed call with no voicemail option is a missed opportunity. A well-configured business voicemail tells callers you are professional, responsive and will get back to them — which matters when you are competing for clients in a crowded market.
Voicemail Numbers for Every UK Mobile Network
Each UK mobile network has its own voicemail number — the short code you dial to access your messages. You also need to know the long-form number if you want to set up call divert to voicemail manually or access your messages from a different phone. Here is a complete reference for 2026:
| Network | Short Voicemail Number | Long Voicemail Number | Access from Another Phone | Cost to Call |
|---|---|---|---|---|
| EE | 901 | +44 7953 966 250 | Call your own number, press * during greeting | Free from EE mobile |
| O2 | 901 | +44 7802 090 901 | Call your own number, press * during greeting | Free from O2 mobile |
| Three | 123 | +44 7782 333 123 | Call your own number, press # during greeting | Free from Three mobile |
| Vodafone | 121 | +44 7836 121 121 | Call your own number, press * during greeting | Free from Vodafone mobile |
| iD Mobile | 222 | +44 7475 074 222 | Call your own number | Free from iD mobile |
| Tesco Mobile | 901 | +44 7802 090 901 (O2 network) | Call your own number | Free from Tesco mobile |
| giffgaff | 443 | +44 7983 100 443 | Call your own number | Free from giffgaff |
Tip: If you manage a fleet of business mobiles, make sure every handset has voicemail activated and a professional greeting recorded before it is issued to staff. A default network greeting — or worse, a full voicemail box — reflects poorly on your business.
How to Set Up Voicemail on iPhone
Setting up voicemail on iPhone is straightforward, and Apple’s visual voicemail feature makes managing messages particularly easy.
Basic Voicemail Setup on iPhone
- Open the Phone app.
- Tap the Voicemail tab at the bottom right.
- If this is your first time, tap Set Up Now.
- Create a voicemail password (you will need this to access messages from another phone).
- Choose Default (uses a generic network greeting) or Custom (lets you record your own greeting).
- If you choose Custom, tap Record, speak your greeting, then tap Stop and Save.
Once set up, any voicemail messages will appear in the Voicemail tab as a list. You can tap any message to play it, read a transcription (on supported models and networks), or delete it.
Recording a Custom Greeting on iPhone
- Open the Phone app and tap Voicemail.
- Tap Greeting in the top left corner.
- Select Custom.
- Tap Record and speak your greeting clearly.
- Tap Stop to finish, then Play to review.
- Tap Save when you are happy with the recording.
For business use, keep your greeting between 15 and 25 seconds. State your name, your company, and let the caller know you will return their call. Avoid background noise when recording.
How to Set Up Voicemail on Android
The process for voicemail setup on Android varies slightly between manufacturers, but the core steps are similar across Samsung, Google Pixel and other devices.
Basic Voicemail Setup on Android
- Open the Phone app.
- Tap the three-dot menu (or Settings / More depending on your device).
- Tap Settings, then Voicemail.
- Confirm your voicemail number is correct (it should be pre-filled by your network — see the table above).
- To record a greeting, dial your voicemail number and follow the voice prompts to set up your mailbox and record a personal greeting.
Samsung Galaxy Voicemail Setup
- Open the Phone app.
- Tap the three-dot menu and select Settings.
- Tap Voicemail and then Voicemail number.
- Verify the number matches your network’s voicemail number.
- Long-press the 1 key on the dial pad to call voicemail and follow the prompts to set up your greeting.
On most Android phones, you can also access voicemail by pressing and holding the 1 key on the dial pad, which speed-dials your voicemail number.
Visual Voicemail: What It Is and Why It Matters
Visual voicemail transforms the traditional voicemail experience by displaying your messages as a list on your phone’s screen — similar to an email inbox. Instead of dialling in and listening to messages sequentially, you can see who called, when they called, and how long the message is, then tap to play any message in any order.
Visual Voicemail Features
- Message list — See all voicemails at a glance with caller ID, timestamp and duration.
- Tap to play — Listen to any message in any order, skip forward or back, and replay as needed.
- Voicemail transcription — On iPhones (iOS 10+) and some Android devices, voicemail messages are automatically transcribed to text so you can read them without listening.
- Delete and manage — Swipe to delete messages or save important ones without navigating phone menus.
- Share — Forward voicemail recordings to colleagues via email or messaging apps.
Visual Voicemail by Network
| Network | Visual Voicemail (iPhone) | Visual Voicemail (Android) | Transcription | Cost |
|---|---|---|---|---|
| EE | Yes | Yes (selected devices) | iPhone only | Free |
| O2 | Yes | Yes (selected devices) | iPhone only | Free |
| Three | Yes | Yes (via Three app) | iPhone only | Free |
| Vodafone | Yes | Yes (selected devices) | iPhone only | Free |
Visual voicemail is particularly valuable for business users who receive multiple messages per day. Rather than spending five minutes dialling in and listening through a queue, you can scan your messages in seconds and prioritise callbacks.
Voicemail-to-Email: Bridging Mobile and Desktop
Voicemail-to-email is a feature that sends voicemail messages to your email inbox as audio attachments, often with a text transcription. This is especially useful for businesses because it means voicemails are captured in your email workflow — they can be searched, filed, forwarded to colleagues, and referenced later.
How Voicemail-to-Email Works
When a caller leaves a voicemail, the network (or a third-party service) converts the recording into an audio file (typically MP3 or WAV) and sends it to a designated email address. Some services also include an automated transcription of the message in the email body.
Who Offers Voicemail-to-Email?
- EE Business — Available on selected business plans. Voicemails are forwarded as audio attachments.
- O2 Business — Available via O2’s business portal for managed accounts.
- Vodafone Business — Offered as part of Vodafone One Net and selected business tariffs.
- Three Business — Available on certain business plans; check with your account manager.
- Third-party apps — Services such as HulloMail, YouMail and Google Voice offer voicemail-to-email functionality that works across all networks.
If your current plan does not include voicemail-to-email natively, ask your provider about upgrading. For businesses managing multiple lines, this feature can save significant time. Get a free business mobile quote to find a plan that includes the voicemail features you need.
Business Voicemail Best Practices
A well-managed business voicemail system does more than catch missed calls — it reinforces your professionalism and ensures no enquiry falls through the cracks. Here are the practices that separate a polished business from one that loses callers to competitors.
Record a Professional Greeting
Your voicemail greeting is often the first impression a new client gets of your business. Keep it clear, concise and professional:
- State your name and company name.
- Acknowledge that you cannot take the call right now.
- Ask the caller to leave their name, number and a brief message.
- Give an indication of when you will return the call (e.g. “within one working day”).
- Optionally, provide an alternative contact for urgent matters.
Example greeting: “Hello, you have reached [Name] at [Company]. I am unable to take your call at the moment. Please leave your name, number and a brief message, and I will get back to you within one working day. For urgent enquiries, please call our main office on [number]. Thank you.”
Keep Your Greeting Up to Date
If you are on holiday, at a conference or out of the office for an extended period, update your voicemail greeting to reflect this. Callers appreciate knowing when to expect a response rather than waiting indefinitely. Set a reminder to revert your greeting when you return.
Check and Clear Messages Regularly
A full voicemail box is worse than no voicemail at all — callers hear a message saying the mailbox is full and have no way to leave a message. Check your voicemail at least twice daily and delete old messages to keep space available. Most UK networks store voicemails for 21–30 days before automatic deletion.
Return Calls Promptly
Aim to return voicemail messages within two to four hours during business hours. Research consistently shows that the speed of your response directly affects conversion rates — particularly for sales enquiries. If you cannot call back immediately, a quick text or email acknowledging the message buys goodwill.
Use Call Forwarding Alongside Voicemail
Voicemail should be your last resort, not your first. Set up call forwarding so that unanswered calls go to a colleague, a reception desk or a shared team number before falling through to voicemail. This way, callers are more likely to reach a real person, and voicemail catches only the calls that nobody could answer.
Voicemail Setup by Network: Detailed Guide
Each UK network handles voicemail setup slightly differently. Here is a network-by-network breakdown covering activation, PIN setup and key settings.
EE Voicemail Setup
- Voicemail is activated by default on most EE plans.
- Dial 901 from your EE mobile to access your voicemail.
- On first access, you will be prompted to set a PIN and record a greeting.
- To change the number of rings before diverting to voicemail, dial **61*+447953966250**[seconds]# (replace [seconds] with 5, 10, 15, 20, 25 or 30).
- To turn off voicemail entirely, dial ##002# and press call.
- To reactivate, dial **004*+447953966250# and press call.
O2 Voicemail Setup
- Voicemail is activated by default on O2.
- Dial 901 from your O2 mobile.
- Follow the prompts to create a PIN and record your greeting.
- To adjust ring time, dial **61*901*11*[seconds]# and press call.
- To switch off voicemail, dial ##002#.
- To reactivate, dial **004*901#.
Three Voicemail Setup
- Dial 123 from your Three mobile.
- Follow the automated prompts to set up your mailbox, create a PIN and record a greeting.
- Three voicemail stores messages for up to 21 days.
- To turn off voicemail, dial ##002#.
- To reactivate, dial **004*+447782333123#.
Vodafone Voicemail Setup
- Dial 121 from your Vodafone mobile.
- Follow the prompts to set a PIN and record your greeting.
- To change ring time before divert, dial **61*+447836121121**[seconds]#.
- To deactivate voicemail, dial ##002#.
- To reactivate, dial **004*+447836121121#.
For a broader comparison of what each network offers business customers, see our guide to EE, O2, Three and Vodafone business mobiles compared.
Professional Voicemail Greeting Tips
Your voicemail greeting says a lot about your business. Here are practical tips for recording a greeting that sounds polished and builds confidence with callers.
What to Include
- Your name — So the caller knows they have reached the right person.
- Your company name — Reinforces your professional identity.
- A brief apology — “I am sorry I cannot take your call right now” is sufficient.
- Instructions — Ask for their name, number and reason for calling.
- Response timeframe — “I will return your call within one working day” sets expectations.
- Alternative contact — For urgent matters, provide another number or email address.
What to Avoid
- Background noise — Record in a quiet room. Road noise, office chatter or music sounds unprofessional.
- Overly long greetings — Keep it under 25 seconds. Callers will hang up if the greeting goes on too long.
- Humour or informal tone — Unless your brand specifically calls for it, keep the tone professional and straightforward.
- Outdated information — A greeting that references last year’s holiday schedule or a phone number you no longer use damages credibility.
- The default network greeting — “The person you are calling is not available” tells the caller nothing about who you are. Always record a custom greeting.
Sample Business Voicemail Greetings
Standard greeting: “Hello, you have reached [Name] at [Company]. I am unable to take your call right now. Please leave your name, number and a brief message, and I will return your call as soon as possible. Thank you.”
Out-of-office greeting: “Hello, you have reached [Name] at [Company]. I am currently out of the office until [date] with limited access to messages. For urgent matters, please contact [colleague name] on [number]. Otherwise, please leave a message and I will get back to you on my return. Thank you.”
Sales team greeting: “Thank you for calling [Company]. All of our team are currently on calls. Please leave your name, number and a brief message, and one of our team will call you back within two hours. Alternatively, you can email us at [email]. Thank you for your patience.”
Voicemail for Business Mobiles: Getting It Right Across a Fleet
Managing voicemail across a fleet of business mobiles requires a consistent approach. Here is how to ensure every device in your organisation handles voicemail professionally.
Standardise Greetings
Create a template greeting script that all staff use, with placeholders for their name and department. This ensures a consistent brand experience for every caller, regardless of which team member they reach.
Set Consistent Ring Times
Configure all devices to divert to voicemail after the same number of rings — 20 seconds (roughly four to five rings) is a good balance between giving the user time to answer and not keeping the caller waiting too long.
Enable Visual Voicemail Where Possible
Visual voicemail makes it faster for staff to check and respond to messages. Ensure it is activated on all compatible devices and that staff know how to use it.
Integrate with Your Phone System
If your business uses a cloud phone system or unified communications platform, integrate mobile voicemail with your main system. Many modern platforms can route mobile voicemails to a central inbox, transcribe them, and log them against customer records in your CRM.
Monitor and Audit
Periodically call your team’s mobiles to check that voicemail is working, the greeting is current, and the mailbox is not full. This simple audit catches problems before your customers do.
Choosing the right business mobile phone plan makes fleet-wide voicemail management significantly easier, particularly when your provider offers centralised account management tools.
Voicemail Alternatives and Complementary Features
While voicemail is essential, it works best as part of a broader call-handling strategy. Consider these complementary features:
- Call forwarding — Divert unanswered calls to a colleague or team before they reach voicemail. See our call forwarding UK guide for setup instructions on every network.
- Auto-attendant — A virtual receptionist that greets callers and routes them to the right department, reducing the number of calls that reach voicemail in the first place.
- Missed call alerts — All UK networks send SMS notifications for missed calls, but third-party apps can provide richer alerts with caller ID lookup.
- Call queuing — For sales and support teams, call queuing holds callers in line rather than sending them to voicemail, improving the chance of a live answer.
- Voicemail drop — A sales tool that lets your team leave a pre-recorded voicemail message on a prospect’s phone without the phone ringing, useful for outbound campaigns.
Choosing the Right Business Mobile Plan for Voicemail
Not all business mobile plans offer the same voicemail features. When evaluating plans, consider the following:
| Feature | Basic Plans | Mid-Tier Plans | Premium Business Plans |
|---|---|---|---|
| Standard voicemail | Yes | Yes | Yes |
| Visual voicemail | Sometimes | Yes | Yes |
| Voicemail-to-email | No | Sometimes | Yes |
| Voicemail transcription | No | iPhone only | Yes (iPhone and Android) |
| Centralised management | No | Limited | Yes (via portal or MDM) |
| Custom hold music/greeting | No | No | Sometimes |
| Message storage duration | 21 days | 30 days | 30–90 days |
If voicemail-to-email, transcription or centralised management are important to your business, make sure your plan includes them — or ask your provider about add-ons. For help finding the right plan, see our round-up of the best mobile networks in the UK for 2026.
Ready to upgrade your business mobiles? Get a free business mobile quote or call us on 0333 015 2615.
Frequently Asked Questions
What is the voicemail number for EE?
The EE voicemail number is 901. You can also dial the long-form number +44 7953 966 250 to access your EE voicemail from another phone. Calling 901 from your EE mobile is free and does not use your inclusive minutes.
How do I set up voicemail on my iPhone?
Open the Phone app, tap the Voicemail tab, and tap Set Up Now. You will be asked to create a PIN and choose between a default or custom greeting. If you choose custom, you can record a personalised greeting directly from the screen. The whole process takes under a minute.
What is visual voicemail?
Visual voicemail displays your voicemail messages as a list on your phone’s screen, similar to an email inbox. You can see the caller’s number, the time of the call and the message duration, then tap to play any message in any order. On iPhones, visual voicemail also provides automatic transcriptions of messages into text.
Can I get my voicemails sent to my email?
Yes. Voicemail-to-email is available on selected business plans from EE, O2, Three and Vodafone. The voicemail is sent as an audio attachment to your email address, often with a text transcription. If your plan does not include this feature natively, third-party apps such as HulloMail can provide it.
How do I turn off voicemail on my mobile?
On all major UK networks, you can deactivate voicemail by dialling ##002# and pressing call. This cancels all conditional call diverts, including the divert to voicemail. To reactivate voicemail, you will need to dial your network’s specific reactivation code (see the network-by-network guide above).
How long are voicemail messages stored?
Most UK networks store voicemail messages for 21 to 30 days before automatically deleting them. On premium business plans, storage may be extended to 60 or 90 days. If you need to keep a voicemail permanently, save it by forwarding it to your email or recording it before the retention period expires.
What should I say in a professional voicemail greeting?
A good business voicemail greeting includes your name, your company name, a brief note that you are unavailable, a request for the caller to leave their name and number, and an indication of when you will call back. Keep it under 25 seconds and record it in a quiet environment. Avoid humour, background noise and overly casual language.
Is there a difference between voicemail on personal and business mobile plans?
The core voicemail service is the same, but business plans often include additional features such as voicemail-to-email, longer message storage, centralised management through an online portal, and the ability to set up shared voicemail boxes for teams. These features make it easier to manage voicemail across multiple lines and ensure no messages are missed.
Why Choose Connection Technologies for Business Mobiles
At Connection Technologies, we help UK businesses get the most from their mobile communications — including making sure voicemail is properly configured across every device. Whether you need help choosing the right network, setting up professional greetings across a fleet, or integrating voicemail with your existing phone system, we are here to help.
- Multi-network expertise — We work with EE, O2, Three and Vodafone, so we recommend the network that best fits your coverage and feature requirements.
- Fleet configuration — We set up voicemail, call forwarding and other features across your entire device fleet so everything works from day one.
- Ongoing support — Our UK-based team is available to troubleshoot voicemail issues, update greetings and optimise your call-handling setup.
- Cost management — We regularly review your tariffs to ensure you have the features you need without paying for those you do not.
Ready to get your business mobiles sorted? Get a free business mobile quote or call us on 0333 015 2615.