Samsung Galaxy S Duos (GT-S7562L) Firmware Overview
What is the latest GT-S7562L firmware?
S7562LVJALK2, released November 13, 2012 for region UPO with Android 4.0. The archive holds 2 official builds for this region.
Is the Samsung Galaxy S Duos still getting updates?
Most likely not: there has been no new firmware since November 2012, so Android 4.0 is the last version this model got. The final builds below are still the best choice for a clean reinstall.
GT-S7562L firmware for region UPO
How to Flash GT-S7562L 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. Use HOME_CSC to keep your data, CSC for a full wipe.