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Already an O2 Business customer?
You can find answers quickly on our help and support pages - choose a category below - or try the Business forum in the O2 Community. If you need to speak to someone, the easiest way is to chat online or call business customer service.
- About your O2 Business account or Billing
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Find out how to view and manage your O2 Business account here
If you need help or have a question about Billing, you'll find a wide range of supporting information in our Billing section.
Otherwise, get in touch using the numbers below.
Telephone numbers and contact hours
Business Customer Service Number Charges From your O2 mobile 8002 Free From a landline 0800 977 7337 Free From abroad +44 808 100 4439 Free Opening times Monday - Friday 08.00 - 20.00 Saturday & Sunday 09.00 - 17.00 Bank Holidays 09.00 - 17.00 If you're managed by a local partner please contact your partner Limited service outside of these hours is available if you have lost or had your mobile phone stolen, or if you have a fault on your O2 landline.
Calls from abroad are free from an O2 Business mobile, other providers' charges may vary. - Calling and travelling abroad
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Got a question about calling abroad from the UK, or are you travelling overseas and have a query about using your device? If so take a look at our calling and travelling abroad help section.
Otherwise, get in touch using the numbers below.
Telephone numbers and contact hours
Business Customer Service Number Charges From your O2 mobile 8002 Free From a landline 0800 977 7337 Free From abroad +44 808 100 4439 Free Opening times Monday - Friday 08.00 - 20.00 Saturday & Sunday 09.00 - 17.00 Bank Holidays 09.00 - 17.00 If you're managed by a local partner please contact your partner Limited service outside of these hours is available if you have lost or had your mobile phone stolen, or if you have a fault on your O2 landline.
Calls from abroad are free from an O2 Business mobile, other providers' charges may vary. - Business Apps
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If you need help with a Business app, take a look at our dedicated Business apps help and support section here.
Otherwise, get in touch using the numbers below.
Telephone numbers and contact hours
Business Customer Service Number Charges From your O2 mobile 8002 Free From a landline 0800 977 7337 Free From abroad +44 808 100 4439 Free Opening times Monday - Friday 08.00 - 20.00 Saturday & Sunday 09.00 - 17.00 Bank Holidays 09.00 - 17.00 If you're managed by a local partner please contact your partner Limited service outside of these hours is available if you have lost or had your mobile phone stolen, or if you have a fault on your O2 landline.
Calls from abroad are free from an O2 Business mobile, other providers' charges may vary. - Devices
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If you need help with your phone or tablet, take a look at our device support section
Otherwise, get in touch using the numbers below.
Telephone numbers and contact hours
Business Customer Service Number Charges From your O2 mobile 8002 Free From a landline 0800 977 7337 Free From abroad +44 808 100 4439 Free Opening times Monday - Friday 08.00 - 20.00 Saturday & Sunday 09.00 - 17.00 Bank Holidays 09.00 - 17.00 If you're managed by a local partner please contact your partner Limited service outside of these hours is available if you have lost or had your mobile phone stolen, or if you have a fault on your O2 landline.
Calls from abroad are free from an O2 Business mobile, other providers' charges may vary. - Network
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You can check network coverage and network status, or get help if you have a network issue in our dedicated network support section here.
Otherwise, get in touch using the numbers below.
Telephone numbers and contact hours
Business Customer Service Number Charges From your O2 mobile 8002 Free From a landline 0800 977 7337 Free From abroad +44 808 100 4439 Free Opening times Monday - Friday 08.00 - 20.00 Saturday & Sunday 09.00 - 17.00 Bank Holidays 09.00 - 17.00 If you're managed by a local partner please contact your partner Limited service outside of these hours is available if you have lost or had your mobile phone stolen, or if you have a fault on your O2 landline.
Calls from abroad are free from an O2 Business mobile, other providers' charges may vary. - Lost or stolen device?
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If your device has been lost or stolen, we're available 24 hours a day to help. We can block your device, and send you a new sim with your existing number. If your device has been stolen, you need to let us and the police know within 24 hours. If it's been lost, just let us know within 24 hours. We'll then cap your liability for calls and data to £100, in case there is any unauthorised use of your device.
0800 977 7337 or +44 808 100 4439 if you're abroad.
If you have phone insurance, we'll also help you make a claim and replace your mobile.
- Broadband & landline
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If you need help regarding your Broadband or landline take a look at our support section here.
Otherwise, get in touch using the numbers below.
Telephone numbers and contact hours
Business Customer Service Number Charges From your O2 mobile 8002 Free From a landline 0800 977 7337 Free From abroad +44 808 100 4439 Free Opening times Monday - Friday 08.00 - 20.00 Saturday & Sunday 09.00 - 17.00 Bank Holidays 09.00 - 17.00 If you're managed by a local partner please contact your partner Limited service outside of these hours is available if you have lost or had your mobile phone stolen, or if you have a fault on your O2 landline.
Calls from abroad are free from an O2 Business mobile, other providers' charges may vary. - It's about something else
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Telephone numbers and contact hours
Business Customer Service Number Charges From your O2 mobile 8002 Free From a landline 0800 977 7337 Free From abroad +44 808 100 4439 Free Opening times Monday - Friday 08.00 - 20.00 Saturday & Sunday 09.00 - 17.00 Bank Holidays 09.00 - 17.00 If you're managed by a local partner please contact your partner Limited service outside of these hours is available if you have lost or had your mobile phone stolen, or if you have a fault on your O2 landline.
Calls from abroad are free from an O2 Business mobile, other providers' charges may vary. - I want to talk to someone
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Telephone numbers and contact hours
Business Customer Service Number Charges From your O2 mobile 8002 Free From a landline 0800 977 7337 Free From abroad +44 808 100 4439 Free Opening times Monday - Friday 08.00 - 20.00 Saturday & Sunday 09.00 - 17.00 Bank Holidays 09.00 - 17.00 If you're managed by a local partner please contact your partner Limited service outside of these hours is available if you have lost or had your mobile phone stolen, or if you have a fault on your O2 landline.
Calls from abroad are free from an O2 Business mobile, other providers' charges may vary. - Prefer to write to us?
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Here’s the address, if you’d rather drop us a line:
O2 Correspondence Team
PO BOX 694
Winchester
SO23 5AP - I want to find an approved O2 Partner
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Go to our Partner Network page here to find an approved O2 Partner
- I want to find a Franchise
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Go to our Franchisees page here.
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