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O2 Customer Service Contact Number

Call 844 385 1711

Calls cost £0.05 per minute plus your providers access charge. You must be at least 18 years of age and be the bill payer or have the bill payers permission to use this service. We are not affiliated with this or any other company listed on this website.

Having issues with O2 services? Facing network issues with O2? Want to make a complaint? We have shared the O2 customer support number below. Once the query is resolved, kindly rate the number below.

How to remove iCloud account from my O2 mobile?

You can remove your iCloud account in the following ways:

  • First you have to sign out of your  iCloud account.
  • Then go to “Settings” > “iCloud” >  select “Delete Account”.
  • Now enter your Apple ID and password.
  • And select “Turn Off”.

How can I check my O2 mobile broadband coverage with Connection Manager?

To check your O2 mobile broadband coverage, follow the steps mentioned below:

  • If your version looks like this, then:
  1. Click “More”.
  2. Select “Favourites”.
  3. And click “Coverage Map”.
  • If your version looks like this, then:
  1. Click on “Tools”.
  2. Click on “Coverage Map”.

If you are facing issues with your O2 mobile broadband, call O2 phone number to get in touch with the customer representative.

Why does my O2 phone disconnect itself during a phone call?

When you are talking on the phone or on the move, your phone switches between “masts”. This usually happens smoothly but sometimes the connections gets lost while switching so your call gets disconnected. When you call back you will be connected to the “mast” that is in your range and your signal will start working again.

For any call related issues, feel free to get in touch with O2 customer support.

Why some of my text messages are delivered all at once when they should be delivered to me earlier?

Sometimes the signal is not available on your phone for a long time which results in delay of the message delivery. Once your phone finds the signal, all the delayed messages will be delivered to you at once.

If you are facing issues with O2 phone signal, contact O2 customer services.

How can I change the address on my O2 account?

To change your address on your O2 account, follow the steps mentioned below:

  • Sign in to My O2 account and choose the mobile number you want to change the address for.
  • On “My Device” page, select the “Bills” tab.
  • Select “Change my billing address” and the company will send a code to your device.
  • Enter the code and fill the form to change your address.

TIP: If you have set up a new account, you cannot change the address for the first 30 days.

For more information, you can get in touch with an agent by calling on O2 phone number.

Why there is a delay in text delivery?

When you are sending the texts, sometimes there are more text messages than “masts” in your area. Most of the time, this condition arises in the crowded places such as a festival or a stadium where lots of people are sending messages at the same time.

For text related queries, call O2 customer support number.

Why are my calls going straight to voicemail, even if there is no missed call?

Sometimes your mobile network is unable find your phone on the network to connect an incoming call. This results in sending your calls to the voicemail. These type of cases happen when there is a loss of signal or the “mast” you are connected to is congested with other calls. If the problem still persists, you can contact O2 customer support by clicking on the link  contact us. Also check if you have not activated the “Divert All Calls” settings in your “Phone and Network” settings.

How to transfer my O2 emails and contacts to Hotmail account?

To transfer your O2 emails to the Hotmail account, follow the steps mentioned below:

  • Go to “Options” > select “Import Email Accounts”.
  • Click on “Other email provider” >  click  “Advanced Options” > and select “My provider doesn’t support IMAP”.
  • Import from POP3 by adding your account to
  • Click on “Advanced Options”.
  • Enter the server address of mail: “”.
  • The port number is 110.
  • Uncheck “requires a secure connection (SSL)”.
  • Enter your username and the password.
  • Click on “Send emails using’s server”.
  • Click “Next”.
  • You can either choose “A new folder” or “Your Inbox”.
  • Click “Go to your inbox”.

It may take a couple of days for the email to show up on your “” account.

To transfer your contacts to Hotmail, follow the steps mentioned below:

  • Sign in to your “My O2” account.
  • Click on “Online Address Book” from your O2 Webmail.
  • Go to “Settings” >  select “Export contacts”.
  • Click on “Export contacts”.
  • All your contacts will be exported into an Excel document.
  • Now sign into your “Hotmail account”.
  • Select “People” > select “Import from file”.
  • Click on “Hotmail account”.
  • Choose the file that you have saved and click on “Import contacts”.
  • Wait for the confirmation.

If you are still facing issues while transferring your mails, feel free to get in touch with O2 customer services.

What to do at the time of a network problem?

If there is a network problem, you can check the “live network checker” to see if there is a current network issue causing the problem. Normally, the network problems are caused due to weather conditions and maintenance work. You can also download My Network app to check the coverage and confirm the company about any network problems.

For network related queries, get in touch with O2 support team by calling on O2 phone number.

How do I activate my new O2 sim?

You can activate your sim by clicking on the link: You can also message “SWAP” to 20220 to activate the new sim. While activating your sim, you will require the sim serial number, written at the back of your sim. The swapping process may take upto 24 hours. After this insert your new sim into your device and turn it “on”. If there is no signal, try turning your device “off” and “on” until you get the signal.

If your sim does not activate after 24 hours, contact O2 support.

What are the ways to top-up my O2 mobile?

Top-Up your O2 mobile in the following ways:

  • You can call on O2 automated service number: 4444.
  • Follow the link: auto top-ups to top up your phone.
  • You also have an option to use an “E-Top Up” card.
  • You can visit U.K cash machines which have the green top-up logo.

For Top-up related queries call O2 phone number to get in touch with the representative.

Where can I find my IMEI number on my Android device?

You will find your IMEI number in the settings of your device. Go to “Settings” > “About Phone”> select “Status” and you will see the number at the bottom of the screen.

You can also dial “ *#06# “ on your phone and the IMEI number will appear on your phone screen.

If you are unable to find IMEI number, get in touch with O2 customer support.

What are the ways to check my “Pay & Go” balance on my O2 mobile?

There are three ways to check your “Pay & Go” balance:

  • On your O2 phone, dial “4444” to check your balance.
  • Press hotkey “2” on your O2 phone.
  • You can also check your balance by dialling “ #10# “ on your phone.

For any balance queries, call O2 contact number to get in touch with the customer support representative.

How can I setup a phone pin on my O2 device?

To set up a phone pin on your O2 device, follow the steps mentioned below:

  • Go to “Settings” on your phone.
  • Select “General” or “Security”.
  • Select “Passcode lock” or “Screen lock”. The terminologies vary from phone to phone.
  • Setup your pin.

If you are unable to set up the pin, call O2 contact number.

How can I setup a sim lock on my O2 device?

You can set up sim lock in the settings page of your device.

  • Go to “Settings” on your O2 device.
  • Go to “Phone” or “Security”.
  • Go to “Sim Lock”.

After you have turned on your sim security, you will be prompted to enter your sim pin each time you start your phone.If you enter the pin incorrectly three times, your sim will be locked. To get it unlocked you will require a PUK (Personal Unlocking Key) code which you can get it online by going into you will be asked a PUK code which you will get online by clicking on the link My O2.

Facing issues while setting a sim lock, contact O2 customer services.

How to get in touch with O2 customer services team?

You can get in touch with the O2 customer services team by calling on the phone numbers mentioned below:

O2 Customer Service

  • For upgrading queries:

O2 contact number: 202 (If you are calling from O2 mobile)

0344 8090202 (If you are calling from a landline)

+44 3448090202 (If you are calling from abroad)

  • For General queries:

O2 phone number: 202 (If you are calling from O2 mobile)

0344 8090202 (If you are calling from a landline)

+44 3448090202 (If you are calling from abroad)

Timings: Weekdays- 8 am to 9 pm.

Saturday- 8 am to 8 pm.

Sunday-8 am to 6 pm.

  • For mobile broadband queries:

Pay Monthly Mobile Broadband: 0344 809 0202

Pay & Go Mobile Broadband: 0344 809 0222

Business Mobile Broadband: 0800 977 7337

For more information click on the link:

How to setup a personal greeting message on my O2 voicemail?

To set up a personal greeting message, follow the steps mentioned below:

  • Dial “901” number on your O2 phone.
  • Now press * on your phone to go to “greetings” and “mailbox” settings.
  • Press “3”.
  • Follow the prompts to change the greeting message.

For voicemail related queries, call the o2 business customer service team.

How to check my voicemail messages on my O2 mobile?

To listen your voicemail messages, dial 901 from your O2 mobile. You can also hold down “1” key to listen to your voicemail messages.

You can use the following keys while listening to your voicemail messages:

  • Use “0” key to pause or continue your message.
  • Use “6” key to skip your message 5 seconds forward.
  • Use “4” key to skip your message 5 seconds backward.

If you are unable to listen your voicemail messages, contact O2 support.

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