This guide will teach you step-by-step how to install the new Android JellyBean runtime on your BlackBerry 10 device. Please follow the instructions carefully. If you don’t feel familiar with the steps shown below, you should wait for an official update to BB10.2 instead.

Disclaimer

You will install an unofficial operating system on your device, it will reset all your data and settings. We are not responsible for any damage or data loss your device may take.

Backup your device

Because you will lose your data, it’s inevitable that you make a full backup of your device. Connect your device via usb to your pc and open BlackBerry Link. Switch to your device, click settings and create a new backup.

Once that’s done, make sure that you really want to switch to a developer version of BB10. You may not be able to restore your backup on the new OS, however you can still downgrade to your previous OS and restore your backup.

Get the developer OS

You can download the 10.2.0.1047 autoloader from here. It’s an about 1GB large windows executable. There’s no way to install the OS using a Mac.
(Source: CrackBerry Forums)

Install BB10.2

When you have the autoloader, connect your device via usb to your pc. Close BlackBerry Link and run the autoloader executable. A command window will popup and your device will restart itself. If your device is password protected, the autoloader will prompt you to enter your password now.

The autoloader will now override your device’s internal storage with the developer OS. When it’s finished, the command window will close itself and your device will reboot. It will now behave like after a factory reset, you will see the setup guide again.

Enjoy the JellyBean runtime

You are now able to use apps requiring the new API versions, you can sideload them like you are used to. The BB10 Sideloading Tool and the apps on our website are ready for the new runtime. Keep in mind that there still are a few limitations, as you can read up here.