The September Android Drop includes five significant features: Motion Assist, Gemini integrations, and various accessibility improvements. Motion Assist helps reduce motion sickness by overlaying a pattern that aligns visual perception while in motion. Gemini can remember the locations of items without a tracker, linked to the Find Hub, but requires Android 16 or higher. To install the update, users should navigate to Settings > Updates or Google Play > Manage apps and device > Updates. Features can be checked by looking for specific indicators in the settings or apps. If a feature is missing, users should update the relevant app, restart their device, and ensure compatibility with Android 16 for certain features. All Android devices will receive most updates via Google Play, while full functionality for Gemini requires Android 16. Users are advised to keep apps updated and maintain backups.