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Our online shop is still open with free next-working-day delivery. We’re asking you to keep customer service lines free for those who need help most. We’ve currently got less people available at our contact centres to take calls. Please support our reduced team by only calling in the most urgent circumstances, like reporting fraud or a stolen phone. For everything else, please try to find answers on our website or through My O2 Business.

About your O2 Business account or Billing

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

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

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

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

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?

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

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

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

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?

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

Go to our Partner Network page here to find an approved O2 Partner

I want to find a Franchise

Go to our Franchisees page here.

 

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My O2 Business

My O2 Business

Track your usage, check your bills, upgrade and more.

My O2 Business

My O2 Business

Track your usage, check your bills, upgrade and more.

 

Not happy about something?

Tell us what's gone wrong and we'll try to make things better.
See how to make a complaint, or take a look at our Customer Complaints Code.