
Samsung Galaxy J3 Pop
The latest firmware for Samsung Galaxy J3 Pop (SM-S337TL) is S337TLUDS7BSK1 with Android 7.0, released on October 31, 2019 for 1 region (CSC). Every official firmware build for SM-S337TL, 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/S337TLUDS7BSK1
All 4 builds in our database run Android 7.0. The newest build, S337TLUDS7BSK1, was released on October 31, 2019. No new build has appeared for 85 months, so regular updates for this model have most likely ended.

SM-S236D

SM-S327VL

SM-S326DL

SM-S536DL

SM-S136DL
The newest firmware for SM-S337TL runs Android 7.0: build S337TLUDS7BSK1, released on October 31, 2019.
The latest build for SM-S337TL, S337TLUDS7BSK1, was released on October 31, 2019 (6 years ago).
SM-S337TL has had no new firmware for 85 months, so regular updates have most likely ended.
Yes, all firmware files for SM-S337TL are 100% official, original, and obtained directly from Samsung servers.
To flash SM-S337TL, 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-S337TL.