|Check network coverage:
|5th generation network. Max data speed of 10 or 20 Gb/s.
|4th generation network. Max data speed of 1 Gbps (1000 Mb/s).
|3rd generation network. Max data speed of 42 Mbps.
|2nd generation network. Max data speed of 0.3 Mb per second.
|Use Wi-Fi for mobile phone calls and texts when no network signal.
|4G Calling (VoLTE)
|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.
|e-SIMs are digital virtual SIM cards downloaded onto supported mobile handsets.
|Network Frequency Bands
|5G (NR) Frequency
|4G (LTE) Frequency
|800 / 900 / 1800 / 2100 / 2300 MHz
|800 / 1800 / 2100 / 2600 MHz
|3G (UMTS) Frequency
|900 / 2100 MHz
|2G (GSM) Frequency
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).
T-Mobile UK is a mobile network operator in the United Kingdom, owned by Deutsche Telekom since 1999, and originally launched as One2One.
In 2009, Deutsche Telekom and Orange SA announced that the T-Mobile network was to be merged with Orange UK in a joint venture with EE Limited to form the UK's largest mobile network.