BlackBerry today beat analysts' profit estimates for its fourth quarter, and said it expects strong billings at its high-margin software and services business for the full year. 

The company, which reinvented itself after customers ditched its smartphones for Apple's iPhones and Android devices, said revenue from its enterprise software and services business rose about 19% to $108m. 

"Our strategy is working," chief executive John Chen said during a morning conference call. 

BlackBerry, which had about 3,500 enterprise customer orders in the quarter, expects total company software and services billings growth to be in "double-digits" in 2019. 

The company extended CEO Chen's contract earlier this month, and followed that up with two big deals in software security - one with Jaguar Land Rover and the other with Microsoft. 

The profit beat was helped by higher margins on software and services sales. 

BlackBerry's gross margins rose to 76% of the revenue, from 60.1% a year earlier. 

Excluding one-time items, the Waterloo, Ontario-based company earned 5 cents per share. 

Analysts on average had expected the company to break even, according to Thomson Reuters I/B/E/S. 

Net loss narrowed to $10m, or six cents a share, in the fourth quarter ended February 28, from $47m, or 10 cents per share, a year earlier. 

The company said its revenue fell 18.5% to $233m.