It's not Easy to Run a Carrier-Owned Over the Top VoIP Service

Jajah, one of the early over the top VoIP services, is shutting down on January 31, 2014. Founded in 2005, jajah was acquired in 2009 by Telefonica for $207 million, as part of a strategy to create a telco-owned over the top service.

But Telefonica has been pursuing other ways of using VoIP to pick up more users, namely with mobile apps like Tu Go. In essense, Tu Go now will do what jajah once was seen as doing.