
Samsung Galaxy J7(2016)
The latest firmware for Samsung Galaxy J7(2016) (SM-J700T1) is J700T1UVU3BQK3 with Android 7.1.1 (Marshmallow), released on November 6, 2017 for 1 region (CSC). Every official firmware build for SM-J700T1, 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/J700T1UVU3BQK3
SM-J700T1 started on Android 6 and has received 1 major Android upgrade; it now runs Android 7.1.1 (Marshmallow). The newest build, J700T1UVU3BQK3, was released on November 6, 2017. No new build has appeared for 109 months, so regular updates for this model have most likely ended.

SM-J700T

SM-J701MT

SM-J710FN

SM-J600N

SM-J727A
The newest firmware for SM-J700T1 runs Android 7.1.1 (Marshmallow): build J700T1UVU3BQK3, released on November 6, 2017.
The latest build for SM-J700T1, J700T1UVU3BQK3, was released on November 6, 2017 (8 years ago).
SM-J700T1 has had no new firmware for 109 months, so regular updates have most likely ended.
Yes, all firmware files for SM-J700T1 are 100% official, original, and obtained directly from Samsung servers.
To flash SM-J700T1, 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-J700T1.