
Samsung Galaxy Quantum2
Every official firmware build for SM-A826S, 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/A826SKSS6GXJ2

SM-A725M

SM-A810F

SM-A920N

SM-A720S

SM-A730X
You can find the firmware on the model: SM-A826S page.
Yes, all firmware files for SM-A826S are 100% official, original, and obtained directly from Samsung servers.
To flash SM-A826S, 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-A826S.