
Samsung Galaxy S3 Mini
The latest firmware for Samsung Galaxy S3 Mini (SM-G730W8) is G730W8VLUBNF3 with Android 4.4.2 (KitKat), released on September 26, 2015 for 6 regions (CSC). Every official firmware build for SM-G730W8, 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/G730W8VLUBNF3
All 5 builds in our database run Android 4.4.2 (KitKat). The newest build, G730W8VLUBNF3, was released on September 26, 2015. No new build has appeared for 134 months, so regular updates for this model have most likely ended.

SM-G935TZK

SM-G930AZK

SM-G935AZS

SM-G935TZS

SM-G935AZK

SM-G935TZD

SM-G975WC

SM-G975FC
The newest firmware for SM-G730W8 runs Android 4.4.2 (KitKat): build G730W8VLUBNF3, released on September 26, 2015.
The latest build for SM-G730W8, G730W8VLUBNF3, was released on September 26, 2015 (11 years ago).
SM-G730W8 has had no new firmware for 134 months, so regular updates have most likely ended.
Yes, all firmware files for SM-G730W8 are 100% official, original, and obtained directly from Samsung servers.
To flash SM-G730W8, 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-G730W8.