Compare O2 with Three Network
| Features |  |
 |
|---|---|---|
| Network Provider | O2 | Three |
| Check network coverage: | O2 coverage | Three coverage |
| 5G Network | Yes | Yes |
| 5th generation network. Max data speed of 10 or 20 Gb/s. | ||
| 4G Network | Yes | Yes |
| 4th generation network. Max data speed of 1 Gbps (1000 Mb/s). | ||
| 3G Network | Yes | Yes |
| 3rd generation network. Max data speed of 42 Mbps. | ||
| 2G Network | Yes | No |
| 2nd generation network. Max data speed of 0.3 Mb per second. | ||
| WiFi Calling | Yes | Yes |
| 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. | ||
| Data Rollover | No | No |
| Unused mobile data allowance rolled over from one month to the next. | ||
| Tethering Allowed | Yes | Yes |
| Tethering allows you to share your mobile internet with other devices. | ||
| eSIM | Yes | Yes |
| e-SIMs are digital virtual SIM cards downloaded onto supported mobile handsets. | ||
| Network Frequency Bands | ||
| 5G (NR) Frequency | 3500 MHz | 3500 MHz |
| 4G (LTE) Frequency | 800 / 900 / 1800 / 2100 / 2300 MHz | 800 / 1500 / 1800 / 2100 MHz |
| 3G (UMTS) Frequency | 900 / 2100 MHz | 2100 MHz |
| 2G (GSM) Frequency | 900 MHz | N/A MHz |
About O2
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).
About Three
Three is the brand name of CK Hutchison Holdings under which several UMTS-based mobile phone networks and Broadband Internet Providers are operated in Australia, Austria, Denmark, Hong Kong, Macau, Indonesia, Ireland, Italy, Sweden, and the United Kingdom.
Founded in 2002, Three operates 5G, 4G and 3G services within the United Kingdom, and is the only UK network operator not to offer 2G coverage.