VODACOM and Research in Motion (RIM), the maker of BlackBerry, are in the process of resolving the connection failure that has left some BlackBerry internet service users in South Africa without access to the internet and social media networks such as Twitter since Friday morning.
"Services are in the process of being restored and we continue to monitor the situation closely," Vodacom spokesman Richard Boorman said.
The problem, originating from a router error, has affected Vodafone customers in Europe, Middle East and Africa.
Vodafone owns a majority stake in Vodacom.
This is not the first time that BlackBerry has experienced a connection problem. The latest outage comes as RIM prepares to launch a new operating system, BlackBerry 10, which it hopes will help it claw back market share, at the end of the month.
The BlackBerry 10 lineup includes devices featuring a touch screen as well as models with regular keyboards.