According to outage tracker Downdetector, complaints included disruptions in calls and mobile data. This followed earlier service issues over the weekend that Three had apologized for.

The company has stated that services are now recovering from the recent network problems and acknowledges that some customers are still waiting for a complete service restoration.

Engineers are actively working on a full fix. Three is currently unable to offer customer service support but is updating its social media with the latest information.

The exact number of affected customers among Three's 10.5 million UK users is unknown. The most recent incident reports began on the morning of February 12, prompting public dissatisfaction on social media and threats by some to switch networks.

Smaller mobile providers that use Three's network, like Smarty, also reported outages. It remains uncertain if customers can seek compensation, though Ofcom's website suggests refunds could be 'appropriate' during repair times.

This disruption coincides with the CMA's investigation into a proposed merger between Three and Vodafone, which has raised concerns over potential consumer impacts. The merger claims to bring an £11 billion investment into the UK's telecommunications infrastructure.