Vodafone says it is working to tackle “disruption” to its mobile and fixed-line broadband services.
It has experienced a fault with an international link used to transmit data between countries but is rerouting traffic to address the issue.
Reports on the DownDetector website indicate that subscribers in the UK, Ireland, Greece, Italy, Portugal and Germany are among those affected.
The problem appears to have begun after 14:00BST.
Some affected users have, however, reported that issues with email and other internet-based activities have been resolved.
Vodafone Ireland has identified the cause of an issue that affected some mobile data and broadband services today. This issue has now been fully resolved. We thank you for your patience and sincerely apologise for the inconvenience caused.
— Vodafone Ireland (@VodafoneIreland) June 13, 2019
The fault comes a day after the firm announced that it had begun allowing users to link their accounts to Amazon’s Alexa service, letting them call contacts via the US company’s smart speakers. However, there is no suggestion that this was the cause of the outage.