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.
Other ways to find answers
Give us a moment
We're just checking to see if there's an available agent.
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.