https://www.reuters.com/article/us-britain-telecom-ofcom/uk-regulator-ofcom-to-investigate-vodafone-bt-on-data-coverage-idUSKCN1MC1U8

Britain's telecoms regulator Ofcom said it would separately investigate if Vodafone Plc and the country's biggest mobile operator EE had provided accurate information in response to requests for 3G and 4G mobile coverage predictions.