Samsung Galaxy Core Duos (GT-I8268) Firmware Overview
What is the latest GT-I8268 firmware?
I8268ZMANI3, released October 15, 2014 with Android 4.1.2. The archive holds 3 official builds across 1 region (CSC). Each one is the full stock ROM (flash file) for Odin, not an OTA patch.
Is the Samsung Galaxy Core Duos still getting updates?
Most likely not: there has been no new firmware since October 2014, so Android 4.1.2 is the last version this model got. The final builds below are still the best choice for a clean reinstall.
All GT-I8268 firmware builds
Older GT-I8268 Builds (Archive)
2 earlier builds from the samdb.org catalogue. They are not in the download list above; the link searches for the build on the partner site.
How to Flash GT-I8268 Firmware
Put the Samsung Galaxy Core Duos into Download Mode, load the BL, AP, CP and CSC files into Odin on a Windows PC and press Start. Use HOME_CSC to keep your data, CSC for a full wipe.