The proposed merger between Vodafone and Three UK, valued at $19 billion, is undergoing a rigorous review by the UK's Competition and Markets Authority (CMA). The CMA has initiated a formal 'Phase 2' investigation after identifying potential competition and pricing concerns in its initial review. This development follows concerns expressed by the 3 UK CEO about the market's state and the financial burden of 5G deployment. The UK regulator has given Vodafone and Three a five-day deadline to propose solutions that could prevent an in-depth investigation. The merger has raised alarms about possible higher prices for mobile customers, contributing to the ongoing cost of living crisis.