Blackberry has resumed a phased rollout of its BBM messaging app for Android and Apple devices after September's botched launch.
The free app is now available for download on Google Play, the App Store and selected Samsung App Stores.
But users had to register an email address after downloading the app then wait in line until they were told they could begin using it, Blackberry said.
Last month Blackberry had to delay the launch after the software was leaked.
The company said that "in just seven hours [following the leak], about one million Android users were using the unreleased version of BBM for Android".
