Want to talk?

We’re asking you to keep customer service lines free for those who need help most. Lockdown measures have meant our call centres are severely restricted. 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

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 10.00 - 16.00
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.
International & Roaming

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 10.00 - 16.00
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

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 10.00 - 16.00
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

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 10.00 - 16.00
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.
Broadband & Landline

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 10.00 - 16.00
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

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 10.00 - 16.00
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 10.00 - 16.00
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 10.00 - 16.00
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.