After a three-day outage that disrupted e-mail and Internet services for millions of customers, BlackBerry services came back to life Wednesday across Europe, Africa, India and the Middle East.

In a statement, Research In Motion apologized to its customers for the service interruptions and delays and said that there was significant increase in service levels.

Service has also improved in the U.S., Canada and Latin America and we are seeing increased traffic passing successfully throughout on most of our services, although there are still some delays reported and services levels may also vary from customers-to-customers. Our teams are working and trying to restore consistent service across all regions, the company said.

BlackBerry users across the world had been facing huge problems since Monday in sending and receiving emails, messages and launching Internet services on their phone.

The company Wednesday said that it was monitoring the situation round the clock to make sure there was no failure of the services.

Earlier, RIM reported that a very important link in the European infrastructure failed Monday and its backup was not working either, because of which a backlog of data was created and had to be cleared prior to restoring service.

The service failure had soon spread to others regions, including the U.S., Canada and Asia.

The service failure occurred at a time when RIM has been fighting off agitated investors who are asking the company to explore strategic options and a new leadership. The company is also facing competition from Apple's iPhone, especially with the iMessage release, which works like the BackBerry Messenger or BBM.