Galaxy S21 FE 5G SM-G990U3 updates & firmware

This page tracks every software update Samsung's update servers list for the Samsung Galaxy S21 FE 5G (SM-G990U3). The latest stable build is G990U3UESNIZI2 (Android 16, security update), first released on Oct 22, 2026. Samsung has published 53 stable builds for this model since Jun 28, 2022: 38 security and 15 feature updates, from Android 12 to Android 16. The current bootloader (binary) version is 23. A device on bit 23 only accepts firmware with bit 23 or higher – see downgrading and the bootloader bit.

Latest build

G990U3UESNIZI2

Released

Oct 22, 2026

Android

Android 16

Bootloader bit

23

Regions

14

Stable builds

53

Update policy

Samsung has not published an update commitment for the Galaxy S21 FE 5G. According to our data it is on Android 16 (One UI 8), last build released Oct 22, 2026.

Compare all models: Samsung update policy by model.

Latest firmware by region (CSC)

Samsung builds firmware per region code (CSC). Pick the code that matches your device – it is shown under Settings › About phone › Software information › Service provider software version. Follow a code for its complete history.

Firmware history (53 builds)

Every stable build (PDA version) Samsung has published for the SM-G990U3, newest first. “Released” is the earliest date the build appeared on Samsung's servers in any region (how dates work). “pulled” means Samsung no longer serves the file for that build, usually because newer builds replaced it (details).

How to download SM-G990U3 firmware

We do not host firmware. Download it directly from Samsung's servers with a free open-source tool, for example samloader:

samloader download -m SM-G990U3 -r XAA

Replace XAA with your region code. Step-by-step instructions, including a graphical alternative: How to download Samsung firmware.

Changelog and security patch level

Samsung publishes the release notes for each update, including the security patch level, on its own site. They are listed per region – for example SM-G990U3 / XAA release notes on doc.samsungmobile.com. Each region page here links to the notes for that code. We don't show the patch level ourselves because Samsung's update servers don't report it (why).