
Samsung Galaxy Tab Q
Every official firmware build for SM-T2519, 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/T2519KEUAOD1

SM-T2558

SM-T350X

SM-T357W

SM-T355C

SM-T230X
You can find the firmware on the model: SM-T2519 page.
Yes, all firmware files for SM-T2519 are 100% official, original, and obtained directly from Samsung servers.
To flash SM-T2519, 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-T2519.