
Samsung Galaxy A3
The latest firmware for Samsung Galaxy A3 (SM-A300YZ) is A300YZUJS1BRH2 with Android 5.0.2 (Lollipop), released on November 27, 2020 for 1 region (CSC). Every official firmware build for SM-A300YZ, 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/A300YZUJS1BRH2
SM-A300YZ started on Android 4 and has received 1 major Android upgrade; it now runs Android 5.0.2 (Lollipop). The newest build, A300YZUJS1BRH2, was released on November 27, 2020. No new build has appeared for 71 months, so regular updates for this model have most likely ended.
Specifications of SM-A300, a regional variant of the same device. Chipset and SIM lines are left out: they can differ by region.
• Network connectivity enhancement.
The exact changes may differ depending on your device model, country/Region, and service provider.
• Other bug fixes
- Network connectivity enhancement.
• The latest Android security patch has been applied.
- Device security has been further enhanced.

SM-A300XU

SM-A307GT

SM-A305YN

SM-A310X

SM-A405S
The newest firmware for SM-A300YZ runs Android 5.0.2 (Lollipop): build A300YZUJS1BRH2, released on November 27, 2020.
The latest build for SM-A300YZ, A300YZUJS1BRH2, was released on November 27, 2020 (5 years ago).
SM-A300YZ has had no new firmware for 71 months, so regular updates have most likely ended.
Yes, all firmware files for SM-A300YZ are 100% official, original, and obtained directly from Samsung servers.
To flash SM-A300YZ, 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-A300YZ.