After September's messed up launch, Blackberry has restarted its BBM messaging app for Android and Apple devices.

The free app can be downloaded from Google Play, the App Store and from certain Samsung App Stores. However, users had to register an email address after downloading the app. After this, they will have to stay in queue until they are told to start using it. This was told by Blackberry.

The launch of Blackberry was postponed last month as its software was leaked. The company revealed that "in just seven hours [following the leak], about one million Android users were using the unreleased version of BBM for Android".

The company told that about six million people had logged in for information related to BBM at BBM. com. Those who had already signed up for information about BBM were able to make use of the app immediately. However, others would have to wait in queue. The waiting time was not told by the company.

Blackberry has been unsuccessful in keeping pace with Apple and devices which are running on Google Android or Windows Phone having Microsoft's operating systems.

In September, Blackberry declared that it was exiting the consumer market to focus on giving services to business customers. The Blackberry Messenger product, known as BBM, has proved very popular among younger users.