Coming off an earnings release, shares of BlackBerry (NASDAQ:BBRY) seem to be showing signs of life. The company reported a 10% boost in its gross profit margin by selling 6 million BlackBerry devices, which 1 million were of the BlackBerry 10 variety. However, aggregate subscriber growth still remains an issue for the company. In this video, Motley Fool contributor Steve Heller discusses the report and what he'd like to see before calling shares a long-term buy.

Erin Miller has no position in any stocks mentioned. Fool contributor Steve Heller has no position in any stocks mentioned. The Motley Fool has no position in any of the stocks mentioned. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.