Three UK Network DOWN

The Three UK Network DOWN has caused widespread disruption across the country, with thousands of users unable to make or receive voice calls on Wednesday, 25 June 2025. The outage, which began in the early hours of the morning, affected customers nationwide. Despite the interruption to voice services, Three UK confirmed that mobile data remains fully operational as engineers work to resolve the issue.

The issue has caused frustration across the country, especially for customers who rely on mobile voice services for work or personal use. In a post on X (formerly Twitter), Three acknowledged the problem, stating that there is “an issue affecting voice services,” and that their technical teams are working urgently to resolve it.

Outage Peaks with Over 9,000 User Reports

The outage was first reported by DownDetector at around 08:00 BST. Reports surged shortly after 09:30, with more than 9,300 users submitting complaints about the inability to make phone calls.

According to data from DownDetector:

• 79% of affected users reported being unable to make voice calls
• 17% experienced a total loss of phone signal
• The remaining users reported various connectivity issues

The problem appears to be nationwide, though some areas — including London, Manchester, Birmingham, and Glasgow — reported higher concentrations of disruption.

Data Still Functioning Normally

While voice calls have been disrupted, Three UK confirmed that data services are working as expected. Customers are still able to access the internet, use social media, stream music, and send messages through apps like WhatsApp, Signal, or Messenger.

In a statement shared with MailOnline, a company spokesperson said:

“We’re aware of an issue affecting voice services and are working hard to fix it. Data services are working normally. We apologise for any inconvenience caused.”

ID Mobile and Smarty Also Affected

The outage has also impacted customers of ID Mobile and Smarty, two smaller networks that operate under the Three UK infrastructure. Users of both networks have taken to social media to report similar call disruptions.

While both ID Mobile and Smarty are marketed as separate carriers, they use Three UK’s backend systems — meaning technical issues on Three’s core network can directly affect their performance.

Vodafone Customers Unaffected

Interestingly, the outage comes just weeks after Three UK announced a major merger with Vodafone. The deal is set to create the UK’s largest mobile operator, with an estimated 27 million customers combined.

However, Vodafone has confirmed that its customers have not been affected by this specific outage, as the two companies continue to operate separately while the merger process is finalized.

More details on the merger can be found in Vodafone’s official press release here.

Users Frustrated by Lack of Call Access

Many users have taken to X, Reddit, and other forums to express frustration over the sudden loss of voice services. Some have reported difficulties making urgent business or healthcare-related calls. Others highlighted the lack of updates or estimated resolution times from the company.

“Can’t make calls, can’t receive them. What’s the point of paying for a phone plan?” one user posted.
“At least tell us when this will be fixed,” another commented.

Three UK has yet to release a full explanation of what caused the issue or when customers can expect full service to return. The company has advised users to reboot their devices as a troubleshooting step, though there is no confirmation that this resolves the issue in most cases.

What You Can Do in the Meantime

While the outage is ongoing, here are a few things you can try:

• Use Wi-Fi calling (if enabled on your phone and supported by your device)
• Rely on messaging apps like WhatsApp, Telegram, or Signal
• Switch to mobile data for communication instead of regular calls
• Restart your device, though this may not resolve the issue if it’s network-wide

If you need to check the current network status, visit Three UK’s Network Checker for updates.

Looking Ahead

This outage highlights the fragility of modern communication infrastructure and the importance of redundancy for essential services. While mobile data remains functional, the inability to place traditional voice calls has left many customers rethinking their reliance on a single network provider.

Three UK says it will continue to provide updates as engineers work to fix the problem. Customers are encouraged to follow their official support page or social media channels for the latest news.

As of this writing, the outage is still active, and no official timeline has been given for resolution.

Sources :

• DownDetector UK – Three Outage
• Three UK Official Support Page
• Vodafone – Merger Announcement
• MailOnline Coverage

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