Tizen 2.4 update for Samsung Z1 comes with build number Z130HDDU0CPB1. The update is around 262MB in size, so one can guess the amount of changes made by the company.
Samsung has added new features like WhatsApp calling, Ultra data savings mode to the Tizen 2.4. Other system apps like Camera, Message, Music Player, Smart Manager, Video Recorder have also received some changes. Samsung Z1 has also received ability to create password protected memos. The home screen and lock screen have also received some minor changes.
Samsung Z1 features a 4 inch WVGA ( 800×480pixels) Super AMOLED Display. It is powered by a 1.2 GHz Dual core Spreadtrum SC7727S processor with 768 MB of RAM. For graphics, it comes with a Mali 400 GPU. It comes with a 3.1 megapixel rear camera with LED Flash and a 0.3 megapixel front camera.
The update is available via OTA. If you not received the update then you can manually check for updates by heading over to settings. As of of now the update is available to Samsung Z1 users in India.