Samsung Galaxy Ace 3 LTE (GT-S7275R) Firmware Overview
What is the latest GT-S7275R firmware?
S7275RXXUAPA3, released April 21, 2016 for region NZC with Android 4.2.2. The archive holds 2 official builds for this region.
Is the Samsung Galaxy Ace 3 LTE still getting updates?
Most likely not: there has been no new firmware since April 2016, 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.
GT-S7275R firmware for region NZC
How to Flash GT-S7275R Firmware
Put the Samsung Galaxy Ace 3 LTE 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.