The conversation between human and AI assistant.
Is it possible to install an open-source operating system on Blackberry Bold 9000? Which one?
Can you explain how to install it?
Sure! Here are the steps to install BlackBerry OS 5.0 on your Blackberry Bold 9000: 
1. First, make sure that you have the necessary tools, such as a USB cable and a computer.
2. Download the BlackBerry OS 5.0 software from the official BlackBerry website.
3. Connect your BlackBerry Bold 9000 to your computer using a USB cable.
4. Install the BlackBerry Desktop Manager on your computer.
5. Run the BlackBerry Desktop Manager and click on Application Loader.
6. Follow the on-screen instructions to install the BlackBerry OS 5.0 software on your Blackberry Bold 9000.