
Samsung Galaxy J2
The latest firmware for Samsung Galaxy J2 (SM-J200M) is J200MUBS2ARK7 with Android 5.1.1 (Lollipop), released on November 8, 2018 for 2 regions (CSC). Every official firmware build for SM-J200M, 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/J200MUBS2ARK7
All 39 builds in our database run Android 5.1.1 (Lollipop). The newest build, J200MUBS2ARK7, was released on November 8, 2018. No new build has appeared for 97 months, so regular updates for this model have most likely ended.
Specifications of SM-J200, a regional variant of the same device. Chipset and SIM lines are left out: they can differ by region.

SM-J200GU

SM-J100VPP

SM-J210F

SM-J106M

SM-J105Y
The newest firmware for SM-J200M runs Android 5.1.1 (Lollipop): build J200MUBS2ARK7, released on November 8, 2018.
The latest build for SM-J200M, J200MUBS2ARK7, was released on November 8, 2018 (7 years ago).
SM-J200M has had no new firmware for 97 months, so regular updates have most likely ended.
Yes, all firmware files for SM-J200M are 100% official, original, and obtained directly from Samsung servers.
To flash SM-J200M, 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-J200M.