Calls cost 7p/min plus your operator’s access charge.

About O2

Telefónica UK Limited, better known as O2, is one of the largest mobile networks in the United Kingdom. The company boasts over 23 million subscribers and uses some of the latest technologies to make their networks reliable and fast. Because O2 is a large company, the customer service department is broken into smaller units. You can call this O2 contact number on 0843 506 0421 to be directed to the right customer service line, or you can dial the telephone number for the appropriate service directly. Which customer service unit is the right choice to assist you will depend upon the nature of your call.

For New Customers

If you’re looking to join millions of others and become a customer, you’ll want to call the Join O2 telephone number. A customer service sales representative can explain all of the options available and help you decide which plan or service is the best fit for your needs. They can also check coverage in your area so that you can decide whether this is the best network for your needs. The O2 contact number for individual or family service is 0843 506 0421. Your call will be answered Monday – Friday from 8:00 to 21:00 and on the weekends from 9:00 to 17:00. Prospective business customers who wish to purchase less than 10 phones should call the contact phone number above to discuss their individual needs. More information for business customers wishing to purchase 10 phones or more is available below. The business sales customer service staff are also available Monday to Friday from 9:00 to 17:00.

For Existing Consumers

Have a question about an item on your bill or want to modify or cancel your service? Need to voice a complaint or inquire about your plan? If you’re an individual or a family user, you’ll need to contact O2 then select the option which corresponds to your type of plan. If you have a traditional contract that renews monthly or annually, call the telephone number above for assistance from the Pay Monthly Team. This is the correct team to contact if you need to:

  • Pay your bill
  • Cancel your contract
  • Obtain a PAC code to transfer your number to another provider
  • Check remaining SMS, minutes and data allowance
  • Upgrade

If you are a Pay and Go customer who purchases credit, minutes or texts in a package for use, the pay and go team will be happy to take your call. Types of enquiry dealt with include:

  • Top-up assistance
  • PAC codes
  • Unlock your phone

The customer service centre is open from Monday to Friday from 8:00 to 21:00, Saturday from 8:00 to 20:00 and Sunday from 8:00 to 18:00. Be sure to have your account information ready when you call to expedite service.

If you have lost your phone or need to report it as stolen, then you should call the help line in order to have your mobile blocked. If you are insured, you can then arrange for a replacement handset and SIM card. You can also call the number from abroad in the following format: 0044 843 506 0421.

For Existing Business Customers

Business customers often have unique needs when it comes to their mobile phone service. As a result, O2 has a customer service helpline for the Business Team dedicated specifically to answering questions, taking complaints and providing service to non-consumer customers. The Business Team ca be reached on the phone number above. The centre answers phones from 8:00 to 20:00 Monday through Friday and from 9:00 to 17:00 on Saturday and Sunday. Enterprise customers that have large accounts can receive personalised service from their account managers.

Additional O2 Contact Number Information

O2 has additional services available for customers beyond traditional mobile phone service. Broadband customer service calls can be placed to the consumer and business telephone numbers. The O2 contact number for travel insurance information and assistance is 0843 506 0421 and you will be connected to the right team by selecting the appropriate keypad options. The customer service centre answers calls Monday to Friday from 9:00 to 17:00.

Important Information: This is a call connection service offered by Mobile Network Guide. When you call the O2 Contact Number above, your call will be connected directly to a member of the Customer Service team. Other numbers can be found on the official website or within the public domain.