Samsung Galaxy Y Duos (GT-S6102B) Firmware Overview
The archive lists 2 official builds for the Samsung Galaxy Y Duos across 1 region (CSC). The newest one is S6102BVJNE1, released June 13, 2014 with Android 2.3.6.
How to Flash GT-S6102B Firmware
Put the Samsung Galaxy Y 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.