
Samsung GALAXY Pocket Neo
The latest firmware for Samsung GALAXY Pocket Neo (GT-S5310I) is S5310IXXU0AQE1 with Android 4.4.2 (KitKat), released on May 8, 2017 for 6 regions (CSC). Every official firmware build for GT-S5310I, 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/S5310IXXU0AQE1
All 10 builds in our database run Android 4.4.2 (KitKat). The newest build, S5310IXXU0AQE1, was released on May 8, 2017. No new build has appeared for 115 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-S5310I runs Android 4.4.2 (KitKat): build S5310IXXU0AQE1, released on May 8, 2017.
The latest build for GT-S5310I, S5310IXXU0AQE1, was released on May 8, 2017 (9 years ago).
GT-S5310I has had no new firmware for 115 months, so regular updates have most likely ended.
Yes, all firmware files for GT-S5310I are 100% official, original, and obtained directly from Samsung servers.
To flash GT-S5310I, 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-S5310I.