
Samsung Galaxy Beam 2
The latest firmware for Samsung Galaxy Beam 2 (SM-G3858) is G3858ZMUANJ1 with Android 4.2.2 (Jelly), released on October 26, 2014 for 1 region (CSC). Every official firmware build for SM-G3858, 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/G3858ZMUANJ1
All 3 builds in our database run Android 4.2.2 (Jelly). The newest build, G3858ZMUANJ1, was released on October 26, 2014. No new build has appeared for 146 months, so regular updates for this model have most likely ended.

SM-G3819

SM-G388F

SM-G386W

SM-G390W

SM-G398FN
The newest firmware for SM-G3858 runs Android 4.2.2 (Jelly): build G3858ZMUANJ1, released on October 26, 2014.
The latest build for SM-G3858, G3858ZMUANJ1, was released on October 26, 2014 (12 years ago).
SM-G3858 has had no new firmware for 146 months, so regular updates have most likely ended.
Yes, all firmware files for SM-G3858 are 100% official, original, and obtained directly from Samsung servers.
To flash SM-G3858, 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-G3858.