
Samsung Galaxy Tab S2
Every official firmware build for SM-T715, 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/T715XXS2CTI1
Box codes of SM-T715 for different colors and markets. Firmware is chosen by the model code SM-T715 and your region (CSC), not by the SKU.

SM-T715C

SM-T719C

SM-T727A

SM-T810X

SM-T818V
You can find the firmware on the model: SM-T715 page.
Yes, all firmware files for SM-T715 are 100% official, original, and obtained directly from Samsung servers.
To flash SM-T715, 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-T715.