Samsung Galaxy S3 Neo+ (GT-I9301I) Firmware Overview
What is the latest GT-I9301I firmware?
I9301IXCUARA1, released February 20, 2018 for region COS with Android 4.4.2. The archive holds 4 official builds for this region.
Is the Samsung Galaxy S3 Neo+ still getting updates?
Most likely not: there has been no new firmware since February 2018, so Android 4.4.2 is the last version this model got. The final builds below are still the best choice for a clean reinstall.
GT-I9301I firmware for region COS
How to Flash GT-I9301I Firmware
Put the Samsung Galaxy S3 Neo+ 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.