
Samsung Galaxy Pop
The latest firmware for Samsung Galaxy Pop (SHV-E220S) is E220SKSAND2 with Jelly(Android Bean), released on April 17, 2014 for 1 region (CSC). Every official firmware build for SHV-E220S, 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/E220SKSAND2
All 4 builds in our database run Android 4.4.4 (KitKat). The newest build, E220SKSAND2, was released on April 17, 2014. No new build has appeared for 152 months, so regular updates for this model have most likely ended.

SHV-E500L

SHV-E400K

SHV-E370K

SHV-E330L

SHV-E330K

SHV-E310L

SHV-E310K

SHV-E300L
The newest firmware for SHV-E220S runs Android 4.4.4 (KitKat): build E220SKSAND2, released on April 17, 2014.
The latest build for SHV-E220S, E220SKSAND2, was released on April 17, 2014 (12 years ago).
SHV-E220S has had no new firmware for 152 months, so regular updates have most likely ended.
Yes, all firmware files for SHV-E220S are 100% official, original, and obtained directly from Samsung servers.
To flash SHV-E220S, 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 SHV-E220S.