
Samsung Galaxy J7
The latest firmware for Samsung Galaxy J7 (SM-J727R4) is J727R4TYU3BUD1 with Android 8.1.0 (Oreo), released on July 29, 2021 for 1 region (CSC). Every official firmware build for SM-J727R4, 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/J727R4TYU3BUD1
SM-J727R4 started on Android 7 and has received 1 major Android upgrade; it now runs Android 8.1.0 (Oreo). The newest build, J727R4TYU3BUD1, was released on July 29, 2021. No new build has appeared for 63 months, so regular updates for this model have most likely ended.
Specifications of SM-J727U, a regional variant of the same device. Chipset and SIM lines are left out: they can differ by region.

SM-J727A

SM-J720M

SM-J737A

SM-J710FN

SM-J730K
The newest firmware for SM-J727R4 runs Android 8.1.0 (Oreo): build J727R4TYU3BUD1, released on July 29, 2021.
The latest build for SM-J727R4, J727R4TYU3BUD1, was released on July 29, 2021 (5 years ago).
SM-J727R4 has had no new firmware for 63 months, so regular updates have most likely ended.
Yes, all firmware files for SM-J727R4 are 100% official, original, and obtained directly from Samsung servers.
To flash SM-J727R4, 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-J727R4.