Samsung Galaxy S Duos (GT-S7568) Firmware Overview
The archive lists 2 official builds for the Samsung Galaxy S Duos across 1 region (CSC). The newest one is S7568ZMAMH2, released February 18, 2014 with Android Cream.
How to Flash GT-S7568 Firmware
Put the Samsung Galaxy S Duos into Download Mode, load the BL, AP, CP and CSC files into Odin on a Windows PC and press Start. Pick a build with the same or a higher Bit than the one installed — a lower bootloader binary will be rejected.