Samsung Galaxy Win DUOS (GT-I8552B) Firmware Overview
What is the latest GT-I8552B firmware?
I8552BDCUANF1, released June 16, 2014 for region THW with Android 4.1–4.3. The archive holds 2 official builds for this region.
Is the Samsung Galaxy Win DUOS still getting updates?
Most likely not: there has been no new firmware since June 2014, so Android 4.1–4.3 is the last version this model got. The final builds below are still the best choice for a clean reinstall.
GT-I8552B firmware for region THW
How to Flash GT-I8552B Firmware
Put the Samsung Galaxy Win 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.