O2 led UK mobile complaints in Ofcom Q4 2025 data

Ofcom said O2 generated the highest mobile complaint rate in the UK in Q4 2025, during a period when the operator faced criticism over higher than expected price rises.

Ofcom, the UK communications regulator, published complaints data covering Q4 2025. The data ranked complaint levels across UK telecoms providers, including mobile operators.

In the mobile segment, O2 recorded the highest complaint rate in Ofcom’s Q4 2025 figures. The period covered by the data was the same quarter in which O2 was criticised over price increases that customers said were higher than expected.

The source report links O2’s position in the complaints table to that pricing issue, but the excerpt does not provide the underlying complaint rate, total complaint volume, or comparative figures for other operators. The published item identifies Ofcom as the source of the Q4 2025 complaints data.

Related questions

• What did Ofcom’s Q4 2025 complaints data say about O2?
• Why was O2 criticised during Q4 2025?
• Which UK regulator published the Q4 2025 telecoms complaints figures?