O2 Mobile UK Services & Support

O2 Customer Support - UK

Our O2 Mobile UK helpline is available 7 days a week to assist you with:

• O2 SIM activations
• O2 monthly phone plan issues
• Billing questions & payments
• Lost or stolen O2 phones
• Porting your number to/from O2
• Account access and upgrades

Popular O2 Mobile Services

• O2 SIM Only Deals: Unlimited calls & data options
• Pay Monthly Phones: Affordable plans with top brands
• O2 Network Coverage: Fast 4G and 5G service across the UK
• Upgrades & Add-ons: Get the latest phones or data boosts

Frequently Asked Questions

How do I activate a new O2 SIM?

Insert the SIM and follow instructions via text. Call us for assistance.

Can I keep my number when switching to O2?

Yes. Provide us your PAC code from your old provider.

Is 5G available on O2?

O2 5G is expanding. Call to check if it's in your area.

Contact Us

Reach out to us for help or to get started: