|Check network coverage:||O2 coverage||EE coverage|
|2nd generation network. Max data speed of 0.3 Mb per second.|
|3rd generation network. Max data speed of 42 Mbps.|
|4th generation network. Max data speed of 1 Gbps (1000 Mb/s).|
|5th generation network. Max data speed of 10 or 20 Gb/s.|
|Use Wi-Fi for mobile phone calls and texts when no network signal.|
|4G Calling (VoLTE)||Yes||Yes|
|Voice over LTE (4G Calling) makes clearer HD calls over 4G networks.|
|Unused mobile data allowance rolled over from one month to the next.|
|Tethering allows you to share your mobile internet with other devices.|
|Network Frequency Bands|
|5G (NR) Frequency||3500 MHz||3500 MHz|
|4G (LTE) Frequency||800 / 900 / 1800 / 2100 / 2300 MHz||800 / 1800 / 2100 / 2600 MHz|
|3G (UMTS) Frequency||900 / 2100 MHz||2100 MHz|
|2G (GSM) Frequency||900 MHz||1800 MHz|
O2 is a mobile network operator and telecommunications services provider in the United Kingdom, under the company name of Telefonica UK Limited. The company was originally formed in 1985 as Cellnet by the BT Group and was one of the earliest mobile phone networks to launch in the UK, and later rebranded as O2 UK.
02 is one of the largest network operators in the UK and provides 2G, 3G, 4G and 5G services to millions of customers in the United Kingdom, as well as to other mobile virtual network operators (MVNO).
EE (previously Everything Everywhere) is a British mobile network operator, Internet service provider and a division of BT Group. EEE was established in 2010 as a fifty-fifty joint venture between Deutsche Telekom and Orange S.A. (formerly France Télécom) through the merger of their respective T-Mobile and Orange businesses in the UK.
EE is currently the largest mobile network operator in the UK, with around 30 million customers and the largest operator of 4G services in Europe. All EE support calls are answered within the United Kingdom or Ireland, and you can easily manage your account either with the "My EE" mobile app, in store, or using the online chat.