The 10.3.1 release was one of the most significant updates for the BlackBerry 10 platform, introducing several tools and APIs for advanced device integration:
The official download for the BlackBerry 10 Native SDK 10.3.1 is no longer hosted on BlackBerry's developer portal, as the company ended support for legacy software systems, including BlackBerry 10, in early 2022. However, developers and enthusiasts can still obtain the SDK through community archives and third-party mirrors. How to Download the BlackBerry 10 Native SDK 10.3.1 blackberry 10 native sdk 10.3.1 download
If you have an existing installation of the Momentics IDE , you can sometimes still download specific API levels (like 10.3.1) by using the Download and Install SDK wizard within the IDE. Note that this may fail if the back-end servers have been completely decommissioned. The 10
Because the standard SWDownloads.BlackBerry.com system is unavailable, you must use alternative sources to set up your development environment: Note that this may fail if the back-end
The community often maintains updated links and "autoloaders" for specific OS and SDK versions. Users on CrackBerry frequently share mirror links for OS 10.3.1 update files and SDK components. Key Features of SDK 10.3.1
The most reliable source for the original installers is the native-SDK-for-blackberry10 directory on the Internet Archive. You can find the Momentics IDE and standalone SDK packages there.