Galaxy S24

Download Samsung Firmware SM-S921B

Samsung Galaxy S24

The latest firmware for Samsung Galaxy S24 (SM-S921B) is S921BXXSIEZJ1 with Android 17, released on October 26, 2026 for 59 regions (CSC). Every official firmware build for SM-S921B, newest first: one row per build with all regions (CSC) that received it.

Latest build
S921BXXSIEZJ1 Android 17 · 12 days ago
Builds
70 builds
Regions (CSC)
104 regions

Firmware builds for SM-S921B

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/S921BXXSIEZJ1

SM-S921B update history

SM-S921B started on Android 14 and has received 3 major Android upgrades; it now runs Android 17. The upgrade to Android 17 started rolling out on October 12, 2026. The newest build, S921BXXSIEZJ1, was released on October 26, 2026 with the October 2026 security patch. That patch (SMR Oct-2026) fixes 62 vulnerabilities, 9 of them critical. Over the last 12 months SM-S921B received 16 builds, with a new build in 12 of those months, in line with Samsung's monthly security updates. Samsung guarantees security updates for this model until January 27, 2031.

Device specifications

Launched with
Android 14
Display diagonal
15.8 cm (6.2")
Display resolution
2340 x 1080 pixels
Processor frequency
2.9 GHz
Processor family
Samsung Exynos
Processor model
2400
RAM
8 GB
RAM type
LPDDR5X
Rear camera resolution
50 MP
Rear camera type
Triple camera
SIM cards
Dual SIM
Battery capacity
4000 mAh
Weight
167 g

Changelog for SM-S921B

• Security
The device is protected with improved security.

These changes may vary depending on the model, country, or network operator of the customer environment.

One UI 9
Galaxy AI

Enhanced Now nudge
Now nudge provides helpful suggestions in more places throughout your Galaxy experience. In addition to the keyboard, suggestions will now appear in conversation notifications and in a floating button in the bottom right corner of the screen. There are also several new types of suggestions, like addresses or saving places in Google Maps.

Focus on someone important
My FanCam lets you select a person in a video and follow them automatically while cropping...

• Security
The device is protected with improved security.

These changes may vary depending on the model, country, or network operator of the customer environment.

One UI 8.5
Visual design

Fresh new look
One UI seamlessly integrates into your daily routine by combining immersive visuals with meaningful personalization for a more refined and sophisticated design. Transparent blur effects add depth and make content easier to navigate, while floating elements react organically to your workflow for a more focused experience. Through familiar and intuitive data visualization, One UI delivers a design that feels both personal and relatable, helping you focus...

• Security
The device is protected with improved security.

These changes may vary depending on the model, country, or network operator of the customer environment.

Show 20 older builds

• Stability and reliability
Device behavior has been improved.
• Security
The device is protected with improved security.

These changes may vary depending on the model, country, or network operator of the customer environment.

• Security
The device is protected with improved security.

These changes may vary depending on the model, country, or network operator of the customer environment.

One UI 8.0 (Android 16)
Galaxy AI

See calls on the screen
Call captions show what each person says on the screen in real time during calls. Follow the conversation on your screen to make sure you don’t miss anything.

Create unique pet portraits
Bring out your pet's personality with Portrait studio. You can now apply portrait effects to pictures of dogs and cats in addition to people. Choose from styles like Fisheye lens, oil painting, and more.

Clean up sound
Use Audio eraser to automatica...

• Security
The device is protected with improved security.

These changes may vary depending on the model, country, or network operator of the customer environment.

• Security
The device is protected with improved security.

• Security

The device is protected with improved security.

These changes may vary depending on the model, country, or network operator of the customer environment.

• Security
The device is protected with improved security.

• The usability of device operations has been improved.

• Security
The device is protected with improved security.

1 retail code (SKU)

Box codes of SM-S921B for different colors and markets. Firmware is chosen by the model code SM-S921B and your region (CSC), not by the SKU.

  • SM-S921BZAGEUB

Similar Models

Frequently Asked Questions

What is the latest Android version for SM-S921B?

The newest firmware for SM-S921B runs Android 17: build S921BXXSIEZJ1, released on October 26, 2026.

When did SM-S921B get its last update?

The latest build for SM-S921B, S921BXXSIEZJ1, was released on October 26, 2026 (yesterday).

How often does SM-S921B get updates?

Over the last 12 months SM-S921B received 16 builds, with at least one new build in 12 different months.

Is the firmware for SM-S921B official?

Yes, all firmware files for SM-S921B are 100% official, original, and obtained directly from Samsung servers.

How to flash Samsung SM-S921B using Odin?

To flash SM-S921B, 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 SM-S921B?

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 SM-S921B.