
Samsung Galaxy Ace 3 Duos
The latest firmware for Samsung Galaxy Ace 3 Duos (GT-S7272) is S7272XXUAOD1 with Android 4.2.2 (Jelly), released on April 20, 2015 for 9 regions (CSC). Every official firmware build for GT-S7272, newest first: one row per build with all regions (CSC) that received it.
Each firmware build has its own page at https://samfirm.shop/build/{PDA}, where {PDA} is the build number from the list above. Example: https://samfirm.shop/build/S7272XXUAOD1
All 8 builds in our database run Android 4.2.2 (Jelly). The newest build, S7272XXUAOD1, was released on April 20, 2015. No new build has appeared for 140 months, so regular updates for this model have most likely ended.

GT-S7508

GT-S6812

GT-S6500L

GT-S5690L

GT-S5670
The newest firmware for GT-S7272 runs Android 4.2.2 (Jelly): build S7272XXUAOD1, released on April 20, 2015.
The latest build for GT-S7272, S7272XXUAOD1, was released on April 20, 2015 (11 years ago).
GT-S7272 has had no new firmware for 140 months, so regular updates have most likely ended.
Yes, all firmware files for GT-S7272 are 100% official, original, and obtained directly from Samsung servers.
To flash GT-S7272, you need to download the appropriate firmware, put your device into Download Mode, and use the Odin tool to load the BL, AP, CP, and CSC files.
Downgrading is only possible if the bootloader version (binary bit) of the old firmware matches the current one. Always check the binary version before flashing GT-S7272.