Vodafone UK blamed changes to its customer care systems for a steep rise in the number of consumer complaints made about the operator to regulator Ofcom in the final three months of 2015.
Three UK CEO David Dyson warned that BT could use its financial clout to outbid rival mobile operators in future spectrum auctions in the country, and called on regulator Ofcom to ensure a level playing field.
Ofcom set out plans to increase Wi-Fi speeds across the UK by releasing more spectrum in the 5 GHz band.
Ofcom rounded out a tough few weeks for Vodafone UK by announcing it believes the operator breached consumer protection laws when billing for PAYG services between 2011 and 2015.
CK Hutchison has not been able to convince European Union antitrust regulators that its deal to buy O2 UK will be of benefit to the market, with reports saying the proposed £10.25 billion (€12.8 billion/$14.5 billion) transaction is expected to be formally blocked within weeks.
EE director of regulatory strategy Inge Hansen called on the UK government to ease planning restrictions covering deployment of fresh infrastructure, arguing that moves to free up additional spectrum alone will not enable operators to match future mobile data demand.
Ofcom published a new framework that it will apply to future decisions on spectrum sharing, and also said it is considering the 3.8-4.2 GHz band as the first opportunity under the structure for shared access.
CK Hutchison lost no time in responding to an open letter written by the CEO of the UK Competition and Markets Authority (CMA) that clearly opposed the company's plan to buy O2 UK, describing the proposed remedy of selling Three UK or O2 to a new MNO to gain approval for the merger as a "red herring".
The UK Competition and Markets Authority (CMA) has become the latest organisation to wade into the increasingly controversial debate over whether CK Hutchison should be allowed to buy O2 UK and merge it with Three UK.
Ofcom said it is allocating 10 MHz of VHF spectrum to encourage UK investment in machine-to-machine (M2M) communications and the Internet of Things (IoT) by allowing large numbers of previously unconnected devices to communicate and share data with one another.