
Samsung Galaxy GIO
The latest firmware for Samsung Galaxy GIO (GT-S5660) is S5660ZSLT5 with Android 2.3.6 (Gingerbread), released on June 1, 2012 for 2 regions (CSC). Every official firmware build for GT-S5660, newest first: one row per build with all regions (CSC) that received it.
All 10 builds in our database run Android 2.3.6 (Gingerbread). The newest build, S5660ZSLT5, was released on June 1, 2012. No new build has appeared for 175 months, so regular updates for this model have most likely ended.
Box codes of GT-S5660 for different colors and markets. Firmware is chosen by the model code GT-S5660 and your region (CSC), not by the SKU.
The newest firmware for GT-S5660 runs Android 2.3.6 (Gingerbread): build S5660ZSLT5, released on June 1, 2012.
The latest build for GT-S5660, S5660ZSLT5, was released on June 1, 2012 (14 years ago).
GT-S5660 has had no new firmware for 175 months, so regular updates have most likely ended.
Yes, all firmware files for GT-S5660 are 100% official, original, and obtained directly from Samsung servers.
To flash GT-S5660, 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-S5660.