
Samsung Galaxy Tab A 7.0
Every official firmware build for SM-T287, 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/T287XXU0AQJ2

SM-T285M

SM-T290N

SM-T387V

SM-T385S

SM-T297
You can find the firmware on the model: SM-T287 page.
Yes, all firmware files for SM-T287 are 100% official, original, and obtained directly from Samsung servers.
To flash SM-T287, 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-T287.