
Samsung Galaxy Trend Plus
The latest firmware for Samsung Galaxy Trend Plus (GT-S7580) is S7580XXUBOL1 with Android 4.2.2 (Jelly), released on December 15, 2015 for 2 regions (CSC). Every official firmware build for GT-S7580, 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/S7580XXUBOL1
All 31 builds in our database run Android 4.2.2 (Jelly). The newest build, S7580XXUBOL1, was released on December 15, 2015. No new build has appeared for 132 months, so regular updates for this model have most likely ended.

GT-S7508

GT-S6812

GT-S6500L

GT-S5690L

GT-S5670
The newest firmware for GT-S7580 runs Android 4.2.2 (Jelly): build S7580XXUBOL1, released on December 15, 2015.
The latest build for GT-S7580, S7580XXUBOL1, was released on December 15, 2015 (10 years ago).
GT-S7580 has had no new firmware for 132 months, so regular updates have most likely ended.
Yes, all firmware files for GT-S7580 are 100% official, original, and obtained directly from Samsung servers.
To flash GT-S7580, 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 GT-S7580.