Samsung Galaxy Trend 3 (SM-G3502U) Firmware Overview
What is the latest SM-G3502U firmware?
G3502UZCUAOH2, released August 25, 2015 with Android 4.2.2. The archive holds 5 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 Trend 3 still getting updates?
Most likely not: there has been no new firmware since August 2015, so Android 4.2.2 is the last version this model got. The final builds below are still the best choice for a clean reinstall.
All SM-G3502U firmware builds
Older SM-G3502U Builds (Archive)
3 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 SM-G3502U Firmware
Put the Samsung Galaxy Trend 3 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.