Galaxy S21 Ultra 5G

Download Samsung Firmware SM-G998U

Samsung Galaxy S21 Ultra 5G

The latest firmware for Samsung Galaxy S21 Ultra 5G (SM-G998U) is G998USQSJHZB1 with Android 15, released on March 19, 2026 for 7 regions (CSC). Every official firmware build for SM-G998U, newest first: one row per build with all regions (CSC) that received it.

Latest build
G998USQSJHZB1 Android 15 · 7 months ago
Builds
111 builds
Regions (CSC)
8 regions

Firmware builds for SM-G998U

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/G998USQSJHZB1

SM-G998U update history

SM-G998U started on Android 11 and has received 4 major Android upgrades; it now runs Android 15. The newest build, G998USQSJHZB1, was released on March 19, 2026 with the January 2026 security patch. That patch (SMR Jan-2026) fixes 32 vulnerabilities, 2 of them critical. No new build has appeared for 7 months, so regular updates for this model have most likely ended.

Device specifications

Launched with
Android 11
Display diagonal
17.3 cm (6.8")
Display resolution
3200 x 1440 pixels
Display type
Dynamic AMOLED 2X
RAM
12 GB
Rear camera resolution
108 MP
Rear camera type
Quad camera
Battery capacity
5000 mAh
Weight
228 g

Specifications of SM-G998, a regional variant of the same device. Chipset and SIM lines are left out: they can differ by region.

Changelog for SM-G998U

No changelog details available.

• Security
The device is protected with improved security.

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

• The security of your device has been improved.

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...

• The security of your device has been improved.

Show 17 older builds
One UI 6.1 Upgrade
Create epic images

Effortlessly enhance your photos
Get special AI recommendations for enhancing your photos and videos. You'll find options for adding star trails, colorizing, and more. Suggestions appear when you tap the i button in Gallery.

Copy and paste from one image to another
Add a missing element to your picture. Just clip an object from an image in Gallery, then go to the image where you want to paste it and choose Paste from clipboard in the More options menu....

• The security of your device has been improved.

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

• The security of your device has been improved.

One UI 6.0 Upgrade
Quick panel

New button layout
The quick panel has a new layout that makes it easier to access the features you use most. Wi-Fi and Bluetooth now have their own dedicated buttons at the top of the screen, while visual features, like Dark mode and Eye comfort shield have been moved to the bottom. Other quick settings buttons appear in a customizable area in the middle.

Instantly access the full quick panel
By default, a compact quick panel with notifications appears when yo...

One UI 6.1 Upgrade
Circle to Search

Instantly search for anything on your screen
Circle to Search with Google lets you easily learn more about anything shown on your screen without switching apps. Just touch and hold the Home button or navigation handle, then circle anything on the screen to start a Google search.

Create epic images

Effortlessly enhance your photos
Get special AI recommendations for enhancing your photos and videos. You'll find options for adding star trails, colorizing,...

• The security of your device has been improved.

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

• The security of your device has been improved.

One UI 6.0 Upgrade
Quick panel

New button layout
The quick panel has a new layout that makes it easier to access the features you use most. Wi-Fi and Bluetooth now have their own dedicated buttons at the top of the screen, while visual features, like Dark mode and Eye comfort shield have been moved to the bottom. Other quick settings buttons appear in a customizable area in the middle.

Instantly access the full quick panel
By default, a compact quick panel with notifications appears when yo...

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Frequently Asked Questions

What is the latest Android version for SM-G998U?

The newest firmware for SM-G998U runs Android 15: build G998USQSJHZB1, released on March 19, 2026.

When did SM-G998U get its last update?

The latest build for SM-G998U, G998USQSJHZB1, was released on March 19, 2026 (7 months ago).

How often does SM-G998U get updates?

SM-G998U has had no new firmware for 7 months, so regular updates have most likely ended.

Is the firmware for SM-G998U official?

Yes, all firmware files for SM-G998U are 100% official, original, and obtained directly from Samsung servers.

How to flash Samsung SM-G998U using Odin?

To flash SM-G998U, 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-G998U?

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-G998U.