Samsung Galaxy S 3 Mini (GT-I8190) Firmware Overview
What is the latest GT-I8190 firmware?
I8190XXAOE2, released May 15, 2015 for region TCL with Android 4.1.2. The archive holds 2 official builds for this region.
Is the Samsung Galaxy S 3 Mini still getting updates?
Most likely not: there has been no new firmware since May 2015, 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.
GT-I8190 firmware for region TCL
How to Flash GT-I8190 Firmware
Put the Samsung Galaxy S 3 Mini 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.