Download Samsung Firmware SC-51B

Samsung Galaxy S21 5G

The latest firmware for Samsung Galaxy S21 5G (SC-51B) is SC51BOMU1EZB1 with Android 15, released on March 18, 2026 for 1 region (CSC). Every official firmware build for SC-51B, newest first: one row per build with all regions (CSC) that received it.

Latest build
SC51BOMU1EZB1 Android 15 · 7 months ago
Builds
19 builds
Regions (CSC)
1 region

Firmware builds for SC-51B

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/SC51BOMU1EZB1

SC-51B update history

SC-51B started on Android 11 and has received 4 major Android upgrades; it now runs Android 15. The newest build, SC51BOMU1EZB1, was released on March 18, 2026 with the September 2025 security patch. No new build has appeared for 7 months, so regular updates for this model have most likely ended.

Changelog for SC-51B

· Device stability improvements, bug fixes.
· New and / or enhanced features.
· Further improvements to performance.

· Device stability improvements, bug fixes.
· New and / or enhanced features.
· Further improvements to performance.

One UI 7.0 Upgrade (Android 15)
Bold new look

Visual enhancements
Enjoy a more sophisticated and unique look. One UI 7 introduces a stunning redesign to key components including buttons, menus, notifications and control bars, providing a more consistent visual experience with curves and circles. Beautiful new colors, soft animations, and an innovative blur effect that's unique to One UI make information hierarchy clearer and help you focus on important information.

Reimagined Home screen
Fr...

· Device stability improvements, bug fixes.
· New and / or enhanced features.
· Further improvements to performance.

· Device stability improvements, bug fixes.
· New and / or enhanced features.
· Further improvements to performance.

Show 17 older builds
One UI 6.1 Upgrade
Circle to Search

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・Device stability improvements, bug fixes.
・New and / or enhanced features.
・Further improvements to performance.

＜note＞
・Please back up your data before updating.
・After the software is updated, downgrading to the previous version is not available.
・Please update the applications after the software is updated.
・Appcloud will be available after the software is upgraded.
・Refer to this link (https://www.docomo.ne.jp/support/manual/sc51b/) to find out more about operation changes after updating...

· Device stability improvements, bug fixes.
· New and / or enhanced features.
· Further improvements to performance.

· Device stability improvements, bug fixes.
· New and / or enhanced features.
· Further improvements to performance.

· Device stability improvements, bug fixes.
· New and / or enhanced features.
· Further improvements to performance.

· Device stability improvements, bug fixes.
· New and / or enhanced features.
· Further improvements to performance.

・Device stability improvements, bug fixes.
・New and / or enhanced features.
・Further improvements to performance.

＜note＞
・Please back up your data before updating.
・After the software is updated, downgrading to the previous version is not available.
・Please update the applications after the software is updated.
・After the software is upgraded, Suguden will no longer be available.
・After the software is upgraded, Change Home Widget is removed from the widget list.
　※You can continue to use th...

· Device stability improvements, bug fixes.
· New and / or enhanced features.
· Further improvements to performance.

· Device stability improvements, bug fixes.
· New and / or enhanced features.
· Further improvements to performance.

· Device stability improvements, bug fixes.
· New and / or enhanced features.
· Further improvements to performance.

· Device stability improvements, bug fixes.
· New and / or enhanced features.
· Further improvements to performance.

· Device stability improvements, bug fixes.
· New and / or enhanced features.
· Further improvements to performance.

・Device stability improvements, bug fixes.
・New and / or enhanced features.
・Further improvements to performance.
・Improved security
A new indicator on the top right of your status bar so you know when your app are accessing your microphone or camera are being accessed

＜note＞
・Please back up your data before updating.
・After the software is updated, downgrading to the previous version is not available.
・Please update the applications after the software is updated.

· Device stability improvements, bug fixes.
· New and / or enhanced features.
· Further improvements to performance.

· Device stability improvements, bug fixes.
· New and / or enhanced features.
· Further improvements to performance.

· Device stability improvements, bug fixes.
· New and / or enhanced features.
· Further improvements to performance.

· Device stability improvements, bug fixes.
· New and / or enhanced features.
· Further improvements to performance.

Similar Models

Frequently Asked Questions

What is the latest Android version for SC-51B?

The newest firmware for SC-51B runs Android 15: build SC51BOMU1EZB1, released on March 18, 2026.

When did SC-51B get its last update?

The latest build for SC-51B, SC51BOMU1EZB1, was released on March 18, 2026 (7 months ago).

How often does SC-51B get updates?

SC-51B has had no new firmware for 7 months, so regular updates have most likely ended.

Is the firmware for SC-51B official?

Yes, all firmware files for SC-51B are 100% official, original, and obtained directly from Samsung servers.

How to flash Samsung SC-51B using Odin?

To flash SC-51B, 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.

Can I downgrade the Android version on SC-51B?

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 SC-51B.