
Samsung Galaxy S5
The latest firmware for Samsung Galaxy S5 (SM-G900MD) is G900MDUBS1CQD2 with Android 6.0.1 (Marshmallow), released on January 13, 2021 for 1 region (CSC). Every official firmware build for SM-G900MD, 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/G900MDUBS1CQD2
SM-G900MD started on Android 4 and has received 2 major Android upgrades; it now runs Android 6.0.1 (Marshmallow). The newest build, G900MDUBS1CQD2, was released on January 13, 2021. No new build has appeared for 70 months, so regular updates for this model have most likely ended.
Specifications of SM-G900, a regional variant of the same device. Chipset and SIM lines are left out: they can differ by region.
• Network connectivity enhancement.

SM-G900AZ

SM-G9098

SM-G903W

SM-G901F

SM-G800X
The newest firmware for SM-G900MD runs Android 6.0.1 (Marshmallow): build G900MDUBS1CQD2, released on January 13, 2021.
The latest build for SM-G900MD, G900MDUBS1CQD2, was released on January 13, 2021 (5 years ago).
SM-G900MD has had no new firmware for 70 months, so regular updates have most likely ended.
Yes, all firmware files for SM-G900MD are 100% official, original, and obtained directly from Samsung servers.
To flash SM-G900MD, 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-G900MD.