Phone and broadband providers
O2 phone numbers
Edited by Richard BarkerChecked 13 October 2026
O2 publishes 7 numbers for you to call on its own website. We list each one with the page it is on (3 pages in all), a short quote from that page and the date we checked it.
Numbers to call O2
What each line is for, as O2 describes it, with opening hours where it gives them.
- 0344 809 0202
You call them on this number
Customer service from a landline (202 from an O2 mobile)
Source: “mobile 202 Free From a landline 0344 809 0202” (opens in a new tab). Checked 13 October 2026.
- 0345 606 2277
You call them on this number
Top-up service from a landline
Source: “mobile 4444 Free From a landline 0345 6062277” (opens in a new tab). Checked 13 October 2026.
- 0800 977 7337
You call them on this number
Business customer service
Source: “mobile 8002 Free From a landline 0800 977 7337” (opens in a new tab). Checked 13 October 2026.
- 0800 081 0255
You call them on this number
Mobile phone sales
Source: “sales Number Charges From any phone 0800 081 0255” (opens in a new tab). Checked 13 October 2026.
- 07860 980202
You call them on this number
Customer service from abroad
Source: “0202 Standard UK rate From abroad +44 7860 980 202” (opens in a new tab). Checked 13 October 2026.
- 0344 809 0222
You call them on this number
Pay As You Go customer service, complaints and lost or stolen devices (4445 from an O2 mobile)
Hours: Monday to Friday 8am to 9pm, Saturday 8am to 8pm, Sunday 8am to 6pm
Source: “If you're a Pay As You Go customer, call 0344 809 0222” (opens in a new tab). Checked 13 October 2026.
- 0808 100 4439
You call them on this number
Business customer service from abroad
Source: “Business Free from an O2 mobile +44 808 1004439” (opens in a new tab). Checked 13 October 2026.
How scams that copy phone and broadband providers work
UK Finance says criminals pose as communications providers and ask for remote access to "fix" a problem. The FCA says that once a scammer can see your screen, they can reach your online banking.
This could still be a scam call
Criminals can make their number look like a genuine one (this is called spoofing). If someone calls from this number and asks for money, bank details, a code or passwords, hang up. Then call O2 back on a number you've found yourself, such as the one on their own website or on a letter or bill from them.
Safe ways to check
- O2's own contact page (opens in a new tab): Where this number is published.
- Report Fraud (opens in a new tab): Report fraud and cyber crime in England, Wales and Northern Ireland. In Scotland, call Police Scotland on 101.
- Forward scam texts to 7726 (opens in a new tab): It is free, and reports the message to your mobile provider.
- How number spoofing works: Why a genuine number on your screen does not prove who is calling.
Questions about O2’s numbers
What numbers can I call O2 on?
O2 publishes 7 numbers for the public to call. They include: 0344 809 0202 (Customer service from a landline (202 from an O2 mobile)); 0345 606 2277 (Top-up service from a landline); 0800 977 7337 (Business customer service). Check the source page for each one before you call, as numbers and opening hours change.
Does O2 publish a number on its own website that is not listed here? Suggest a number for O2.
Sources and checks
This page relies on:
- O2: o2.co.uk/contactus
- O2: o2.co.uk/help/safety-and-security/device-security/lost-stolen-device
- O2: o2.co.uk/how-to-complain
Checked on 13 October 2026. Read how we build the directory. How we check our information. Spotted a mistake? Tell us and we will put it right.