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O2 Customer Service Information

Find helpful guides, FAQs, and contact details for O2 support below.

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O2 phone support: 0344 809 0202 (Mon-Fri 8am-9pm, Sat 8am-8pm, Sun 8am-6pm)

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O2 Help Guides

Fix your O2 problems without waiting on hold. Step-by-step guides for billing, technical issues, account management, and device problems.

Call 0344 809 0202

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Fix bill disputes, wrong charges, roaming shock, and payment issues

Charged twiceBill too highRoaming chargesRefunds

Technical Guide

Solutions for signal, data, WiFi calling, and voicemail problems

No signalData not workingWiFi callingVoicemail

Help with login issues, PAC codes, contract cancellation, and upgrades

Login problemsPAC codeCancel contractUpgrades

SIM activation, phone unlocking, lost devices, and insurance claims

SIM issuesUnlock phoneLost phoneInsurance

Popular Guides

Get Your PAC Code

Transfer your number to another network

Cancel Your Contract

Leave O2 and avoid early termination fees

Fix Signal Problems

Troubleshoot no service and poor reception

Unlock Your Phone

Use your O2 phone on any network

Roaming Guide

Use your phone abroad without bill shock

eSIM Setup

Activate and manage your O2 eSIM

Make a Complaint

Escalate issues to the Ombudsman

PAYG Guide

Top up, check balance, and manage PAYG

Can't Find Your Answer?

If you can't find a guide for your specific problem, contact O2 directly:

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