
Samsung Galaxy Note 2 DUOS (China)
The latest firmware for Samsung Galaxy Note 2 DUOS (China) (GT-N7102) is N7102ZNUEOJ1 with Android 4.3 (Jelly), released on October 7, 2015 for 1 region (CSC). Every official firmware build for GT-N7102, 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/N7102ZNUEOJ1
All 6 builds in our database run Android 4.3 (Jelly). The newest build, N7102ZNUEOJ1, was released on October 7, 2015. No new build has appeared for 134 months, so regular updates for this model have most likely ended.

GT-N7000B

GT-N5105

GT-N8020

GT-N8013

GT-N8005
The newest firmware for GT-N7102 runs Android 4.3 (Jelly): build N7102ZNUEOJ1, released on October 7, 2015.
The latest build for GT-N7102, N7102ZNUEOJ1, was released on October 7, 2015 (11 years ago).
GT-N7102 has had no new firmware for 134 months, so regular updates have most likely ended.
Yes, all firmware files for GT-N7102 are 100% official, original, and obtained directly from Samsung servers.
To flash GT-N7102, 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-N7102.