Just yesterday, the Galaxy Win got officially announced in China and now we have received its first ever official firmware. The firmware is based on Android 4.1.2 and comes with Samsung's Nature UX. For now, Samsung only pushed the final (retail) firmware for China, we hope other countries to follow soon. You can download the firmware through our Firmware Section.
Firmware Details:
Android Version: 4.1.2 – Build JZO54K
PDA: I8552ZCAMCD
CSC: I8552CHNAMCD
MODEM: I8552ZCAMCD
Build Date: 28 March 2013
Changelist: 1066460