Personal | Business
Sign in or Register
O2 Logo White
  • Shop

    Phones

    • Phones
    • Upgrades
    • Apple iPhone
    • iPhone 16
    • Android phones
    • Refurbished phones

    Tablets, laptops and dongles

    • Tablets
    • Apple iPad
    • Android tablets
    • Laptops
    • Dongles and mobile WiFi

    SIMs and Tariffs

    • Pay Monthly SIMs
    • Pay As You Go SIMs
    • Tariffs
    • International
    • Top-up
    • Essential Plan

    Accessories and more

    • Tech and accessories
    • Apple Watch
    • Smartwatches
    • AirPods
    • Coming soon
    • Great deals
  • Why O2

    Flexibility

    • O2 Switch up
    • O2 custom plans
    • Multisave
    • O2 Recycle
    • Click and collect

    Perks

    • O2 Extras
    • Volt
    • Priority tickets and offers
    • Perks at O2 venues
    • Pay As You Go Rewards

    Services

    • Manage your account
    • Keeping kids safe online
    • Ideas and Inspiration
    • Insurance

    Connected

    • Coverage checker
    • Network coverage
    • 5G coverage
    • O2 WiFi
    • Using your phone abroad
    • Live bigger with Volt

      Discover extra benefits
    • O2 bubbles

      See all the reasons to choose O2

      Why join O2?
  • Help

    Help and support

    • Account
    • Products and services
    • Device guides
    • Network and international
    • Safety and security

    Most popular

    • Activating your SIM
    • eSIM
    • How to track your order
    • Payment support
    • Understanding your bill

    Useful links

    • Store locator
    • Network status
    • Faulty device
    • Virgin Media O2
    • Fraud help

    Contact us

    • O2 Community
    • My O2 App
    • Contact us
  • My O2
  • Search
  • Basket

Voicemail 901

Help and support

Voicemail 901 is your answerphone. It answers any calls you miss and lets you know when you have new messages. It's available to all O2 customers by calling 901 and it’s ready to go on all new O2 phones. If ever it's switched off, you can turn it on by calling 1750 free from your mobile.

To keep your messages secure you need to set up a voicemail PIN. We’ll ask you to set one up the first time you call 901, or if your phone’s been reset.

Voicemail 901 comes with a standard greeting. To personalise your message, just:

  1. dial 901 from your O2 mobile

  2. press *

  3. choose option 3

  4. follow the prompts to personalise your message.

You can change your greeting as often as you like.

Dial 901 from your O2 mobile to check your messages.

While you're listening to a message you can press:

  • 0 to pause or continue

  • 4 to skip back five seconds

  • 6 to skip forward five seconds.

After you've listened to a message you can press:

  • 1 to replay it

  • 2 to save it

  • 3 to delete it

  • 5 to return the call

  • 7 to forward the message to another mailbox or leave a voicemail for the caller (Pay Monthly customers only)

  • 8 to hear who called you and when

  • 9 to reply by text (Pay Monthly customers only).

Calls to 901 are included in your call tariff allowance. Outside your allowance, it costs the same to listen to a voicemail as it does to make a standard call to the UK.

There's no charge for receiving a message if you don't listen to it.

Before you travel, you'll need to know your PIN. Calling 901, as usual, works in most countries.

If it doesn't, call 07860 980980 free from your mobile and enter your mobile number and mailbox PIN when prompted.

Depending on which country you're in, you'll either go straight to your messages or to your voicemail greeting.

If it's your greeting, press * and type in your PIN.

If you forget your PIN while abroad, text RESET to 802901.

Please note: Changing your reset PIN only works if you can access your voicemail using 901.

You can change your pin any time, just:

  • call 901

  • press *

  • Choose option 4

  • Follow the instructions for setting up a PIN.

When you set your PIN, try to choose a number that’s difficult to guess. So don’t go for repeat or consecutive numbers, or the year you were born.

You can reset your PIN at any time, just text RESET to 802901. You'll be sent a temporary PIN, which you’ll need to change before you can listen to your messages.
You can change your PIN any time, just:

  • call 901

  • press *

  • choose option 4

  • follow the instructions for setting up a PIN.

When you set your PIN, try to choose a number that’s difficult to guess. So don’t go for repeat or consecutive numbers, or the year you were born.

If you don’t want Voicemail 901 on your phone, dial 1760 free from your mobile to switch it off.

You can’t use Voicemail 901 if you have O2 Call Alert. If you want to swap between the two, call 1710 free from your mobile. Learn more about O2 Call Alert.

Last updated: 10/02/2025


Was this information helpful?


Can't find what you're looking for?

My O2

Track your usage, check your bills, upgrade and more

Go to My O2

Need help with your device?

Take a look at our useful self-help guide

Go to help

O2 Community

Head to our forum to ask questions and chat with other O2 customers

Join in
  • Find a store
  • Check our network
  • Sign in to My O2
  • Track my order
  • Search

Popular in shop

  • iPhone 16 Pro Max
  • iPhone 16 Pro
  • iPhone 16
  • Apple Watch Series 10
  • Apple iPad A16
  • Samsung Galaxy S25 Ultra
  • Samsung Galaxy S25
  • Samsung Galaxy Z Flip6
  • Google Pixel 9 Pro XL
  • Google Pixel 9 Pro
  • SIM Only Deals
  • Virgin Media broadband deals

Help and Support

  • Help home
  • Contact us
  • My O2
  • Collection and delivery

Shop

  • Phones
  • Tablets
  • Pay Monthly SIM
  • Collection and delivery
  • Virgin Media O2 Joint Venture
  • Facebook
  • Youtube
  • X
  • Instagram
  • About O2
  • Better Connections Plan
  • Careers
  • News & PR
  • Sponsorship
  • Virgin Media and O2
  • Accessibility
  • Terms & Conditions
  • Privacy policy
  • Cookie policy
  • Modern Slavery Statement

©2025 Telefonica UK Limited

In relation to consumer credit, Telefónica UK Limited is authorised and regulated by the Financial Conduct Authority (Reference Number 718822)

  • Home
  • Help
  • Phones and devices
  • Calls and Messaging
  • Voicemail

Related pages

  • Supplementary services

  • Help