
Samsung Galaxy Note 10.1 2014 Edition
The latest firmware for Samsung Galaxy Note 10.1 2014 Edition (SM-P605M) is P605MUBUDOH1 with Android 4.4.2 (KitKat), released on August 19, 2015 for 1 region (CSC). Every official firmware build for SM-P605M, 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/P605MUBUDOH1
All 13 builds in our database run Android 4.4.2 (KitKat). The newest build, P605MUBUDOH1, was released on August 19, 2015. No new build has appeared for 136 months, so regular updates for this model have most likely ended.
Specifications of SM-P605, a regional variant of the same device. Chipset and SIM lines are left out: they can differ by region.

SM-P605V

SM-P602

SM-P610X

SM-P907A

SM-P905V
The newest firmware for SM-P605M runs Android 4.4.2 (KitKat): build P605MUBUDOH1, released on August 19, 2015.
The latest build for SM-P605M, P605MUBUDOH1, was released on August 19, 2015 (11 years ago).
SM-P605M has had no new firmware for 136 months, so regular updates have most likely ended.
Yes, all firmware files for SM-P605M are 100% official, original, and obtained directly from Samsung servers.
To flash SM-P605M, 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-P605M.