O2 is one of the primary mobile network operators in the United Kingdom today, and has since expanded into other areas such as offering home broadband and landline.

They provide hardware support on your mobile phone, as well as device support if your broadband stops working. You can contact the O2 customer service number on the telephone number below. O2 customer service is open Weekdays 8:00am-9:00pm, Weekends 9:00am-5:00pm.

O2 Phone Number:

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Who is O2?

O2 began life as part of the BT Group, and their BT Cellnet offering was one of the popular Pay as you Go and Pay Monthly services on offer in the 1990s. This was separated from the BT Group in 2002 and became known as O2, as they focused solely on mobile phones and not fixed line connectivity.

This company was purchased in 2006 by Telefónica, a Spanish telecom company that had services all over Europe. The brand continued, and is still one of the major players in the market today alongside Vodafone, Three and EE (which is now owned by BT).

It has currently has over 12 million pay monthly customers in the UK, which makes up just over half of its entire customer base. This lags behind EE’s 28 million, but that company was formed after a merger of two of the competitors, T-Mobile and Orange.

O2 Customer Services

The O2 helpline is always looking to help you out, and are available Monday to Friday between 8am and 9pm. Saturday opening hours are between 8am and 8pm, whilst on Sunday they are only open between 8am and 6pm.

You may need to have all of your account details to hand before you call O2 contact number, as they have some stringent security measures in place before the customer service team will discuss your account with you.

O2 Faults and Coverage Checker

If you’ve found that you’re having trouble connecting to the network, you may be in one of the network’s blackspots. You can check your coverage at the website, or you can give the O2 number a call to discuss your options.

O2 Network

The network provides the backbone for a number of different brands in the UK, including Tesco Mobile, the offering provided by the supermarket chain, and also Giffgaff.

Giffgaff started as a Pay as you Go network but now offers SIM only contracts and pay monthly phones without any tie in. Giffgaff consistently has an extremely high customer satisfaction rating with its customers.

O2 Priority

One of the company’s leading services is O2 Priority, previously known as Priority Moments, which offers customers a range of exclusive benefits and rewards, simply for being an O2 Pay Monthly or Pay as you Go customer.

Rewards range from a free meal at your local Pizza Express, or a free downloadable movie from the service directory. You’re also able to buy tickets to various events and venues, including those at the Arena in London, earlier than the rest of the general public.

If you’re having trouble redeeming any of your Priority rewards, or if you need help signing up or seeing if you’re eligible for the service, then give the O2 telephone number a call at the number at the top of this page.