
Samsung Galaxy Y Pro
The latest firmware for Samsung Galaxy Y Pro (GT-B5510) is B5510XXLK3 with Android 2.3.6 (Gingerbread), released on November 26, 2012 for 1 region (CSC). Every official firmware build for GT-B5510, 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/B5510XXLK3
All 3 builds in our database run Android 2.3.6 (Gingerbread). The newest build, B5510XXLK3, was released on November 26, 2012. No new build has appeared for 169 months, so regular updates for this model have most likely ended.
Box codes of GT-B5510 for different colors and markets. Firmware is chosen by the model code GT-B5510 and your region (CSC), not by the SKU.

GT-B9120

GT-B9062

GT-B5512B

GT-B9150

GT-B5330L
The newest firmware for GT-B5510 runs Android 2.3.6 (Gingerbread): build B5510XXLK3, released on November 26, 2012.
The latest build for GT-B5510, B5510XXLK3, was released on November 26, 2012 (13 years ago).
GT-B5510 has had no new firmware for 169 months, so regular updates have most likely ended.
Yes, all firmware files for GT-B5510 are 100% official, original, and obtained directly from Samsung servers.
To flash GT-B5510, 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-B5510.