Scores of BlackBerry subscribers today faced disruption in accessing Internet and using messenger services, even as the smartphone manufacturer, Research In Motion, assured its customers of resolving the glitch soon.
India is estimated to have one million users of BlackBerry.
"We are working to resolve an issue currently impacting some BlackBerry subscribers in Europe, the Middle East and Africa and India. We're investigating, and we apologise to our customers for any inconvenience caused whilst this is resolved," Canada-based RIM said in a statement.
Telecom operators in India maintained that there was no problem at their end. Glitches in BlackBerry services were reported from different parts of the world.
"Millions of BlackBerry smartphone users have been cut off by a major fault at RIM, the Canadian company that makes the devices," UK's Daily Telegraph said in a report.
Vodafone UK said that customers across Britain appeared to be unable to access BlackBerry Messenger, a free-to-use instant messaging program which has helped make the handset popular with young people.
"The glitch was affecting online services for consumers all over Europe, the Middle East and Africa. All are served by a RIM data centre in Slough," it added.
Khaled Hegazy, Vodafone Egypt's spokesman, said "there is a problem with the servers in Canada which is affecting service" in the region. He said they expected it would take about another four hours to resolve the issue, which first appeared to crop up at about 1000 GMT.
The outage occurred as RIM's co-CEO Jim Balsillie and other executives were in Dubai for the annual GITEX electronics show. Balsillie earlier in the day unveiled a new service at the show that will soon let users of some of its latest BlackBerry phones share documents, web links and other information with others by tapping their smartphones together.
Hundreds of users flooded microblogging site Twitter, complaining about disruptions in BlackBerry services.