Telefónica Europe
- Rank in Country: 02
- Operator: Telefónica Europe
- Type: National
- Technology: GSM 900 / GSM 1800 / UMTS 900 / UMTS 2100 / LTE 800 / LTE 1800 / LTE 2100 / TD-LTE 2300
- Ownership: O2 (UK)
- MCC:234
- MNC: 02
- Status: Operational
- Description:
| Name | O2 |
|---|---|
| Company | Telefonica Europe |
| Country |  United Kingdom |
| Country ISO | GB |
| Country code | + 44 |
| Carrier website | http://www.o2.co.uk/ |
| Carrier codes |
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| Mobile prefix | 71, 72, 74, 75, 76, 77, 78, 79 |
| Size of NSN | 10 |
| Number format | +44 71x xxx xxxx +44 72x xxx xxxx +44 74x xxx xxxx +44 75x xxx xxxx +44 76x xxx xxxx +44 77x xxx xxxx +44 78x xxx xxxx +44 79x xxx xxxx more... |
| Coverage map | Check O2 Coverage |
| Subscribers | 24 800 000 (32 400 000 inc MVNO) (June 2018) |
| GSM bands |
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| GSM protocols |
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| UMTS bands |
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| UMTS protocols |
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| LTE bands |
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| LTE protocols |
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