
Samsung Galaxy Note3 Neo
The latest firmware for Samsung Galaxy Note3 Neo (SM-N750S) is N750SKSS1CRK3 with Android 4.4.2 (Lollipop), released on November 27, 2018 for 1 region (CSC). Every official firmware build for SM-N750S, 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/N750SKSS1CRK3
All 8 builds in our database run Android 4.4.2 (Lollipop). The newest build, N750SKSS1CRK3, was released on November 27, 2018. No new build has appeared for 96 months, so regular updates for this model have most likely ended.
Specifications of SM-N7505, a regional variant of the same device. Chipset and SIM lines are left out: they can differ by region.

SM-N920AZW

SM-N920VZW

SM-N950UZK

SM-N920AZK

SM-N950X

SM-N930V

SM-N9300

SM-N930S
The newest firmware for SM-N750S runs Android 4.4.2 (Lollipop): build N750SKSS1CRK3, released on November 27, 2018.
The latest build for SM-N750S, N750SKSS1CRK3, was released on November 27, 2018 (7 years ago).
SM-N750S has had no new firmware for 96 months, so regular updates have most likely ended.
Yes, all firmware files for SM-N750S are 100% official, original, and obtained directly from Samsung servers.
To flash SM-N750S, 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 SM-N750S.