Vodafone has said it is aware of issues affecting some of its BlackBerry customers and is investigating the cause.
An update on the firm's forum pages posted on Friday morning said it was working with Research in Motion (RIM) to try and fix the problem.
"We are aware that some BlackBerry customers are experiencing issues," it said.
"Vodafone is working closely with Research in Motion (RIM) to restore full service as soon as possible. As soon as we have further information we will provide further updates."
V3 contacted RIM for comment but had received no reply at time of publication.
A message on its UK Twitter page admitted to the issues, though.
Vodafone service issues are impacting some BlackBerry customers in Europe, Middle East & Africa. We are supporting their efforts to resolve.— BlackBerry UK (@UK_BlackBerry) January 11, 2013
V3 tested a corporate BlackBerry account on Vodafone this morning but was receiving a full service.
However, scores of customers took to Twitter to complain about a lack of service.
Blackberry down AGAIN, annoying— Stuart (@StuartCamp) January 11, 2013
The incident comes at an awkward time for RIM as it prepares for its make or break launch of BlackBerry 10 on 30 January. It's seen by many in the mobile market as the firm's last chance of stemming an exodus of customers to rivals such as Apple and Android.
The firm has already suffered several high-profile outages that have damaged its reputation as a secure network. The most notable of these occurred in late 2011 when services were out for several days.
UPDATE (15:00 GMT): Vodafone has admitted the error was caused by a router and affected services across Europe, Middle East and Africa.
"Services are in the process of being restored and we continue to monitor the situation closely," it said in a forum posting.
"We apologise to customers for any inconvenience caused and we will provide updates as necessary."
Dan Worth is the news editor for V3 having first joined the site as a reporter in November 2009. He specialises in a raft of areas including fixed and mobile telecoms, data protection, social media and government IT. Before joining V3 Dan covered communications technology, data handling and resilience in the emergency services sector on the BAPCO Journal.