Galaxy S21 5G

Download Samsung Firmware SM-G991B

Samsung Galaxy S21 5G

The latest firmware for Samsung Galaxy S21 5G (SM-G991B) is G991BXXUJHZF2 with Android 15, released on July 9, 2026 for 1 region (CSC). Every official firmware build for SM-G991B, newest first: one row per build with all regions (CSC) that received it.

Latest build
G991BXXUJHZF2 Android 15 · 3 months ago
Builds
162 builds
Regions (CSC)
167 regions

Firmware builds for SM-G991B

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/G991BXXUJHZF2

SM-G991B update history

SM-G991B started on Android 11 and has received 4 major Android upgrades; it now runs Android 15. The newest build, G991BXXUJHZF2, was released on July 9, 2026 with the January 2026 security patch. That patch (SMR Jan-2026) fixes 32 vulnerabilities, 2 of them critical. Over the last 12 months SM-G991B received 4 builds, spread over 4 different months. Builds of this model reach 167 regions (CSC); AUT (Switzerland) usually gets a new build first (50% of recent builds).

Device specifications

Launched with
Android 11
Display diagonal
15.8 cm (6.2")
Display resolution
2400 x 1080 pixels
Display type
Dynamic AMOLED 2X
Processor frequency
2.9 GHz
RAM
8 GB
RAM type
LPDDR5
Rear camera resolution
12 MP
Rear camera type
Triple camera
SIM cards
Dual SIM
Battery capacity
4000 mAh
Weight
171 g

Changelog for SM-G991B

• Stability and reliability
Device behavior has been improved.

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.

• Security
The device is protected with improved security.

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 18 older builds

• Security
The device is protected with improved security.

• The security of your device has been improved.

• Security
The device is protected with improved security.

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

• The security of your device has been improved.

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

• Security
The device is protected with improved security.

• The security of your device has been improved.

• Security
The device is protected with improved security.

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

• 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.

56 retail codes (SKU)

Box codes of SM-G991B for different colors and markets. Firmware is chosen by the model code SM-G991B and your region (CSC), not by the SKU.

  • SM-G991BZAEATS
  • SM-G991BZVDEUC
  • SM-G991BZADEEE
  • SM-G991BZIDEUA
  • SM-G991BZIDMEA
  • SM-G991BZWAATS
  • SM-G991BZWEATS
  • SM-G991BZIGMEA
  • SM-G991BZWGMEA
  • SM-G991BZVGMEA
  • SM-G991BZADMEA
  • SM-G991BZWDMEA
  • SM-G991BZVDMEA
  • SM-G991BZAGEUA
  • SM-G991BZWDEUB
  • SM-G991BZVGEUB
  • SM-G991BZADEUB
  • SM-G991BZWGEUB
  • SM-G991BZIDEUB
  • SM-G991BZAGEUB
  • SM-G991BZVDEUB
  • SM-G991BZIGEUB
  • SM-G991BZVGEUC
  • SM-G991BZWDEUC
  • SM-G991BZIDEUC
  • SM-G991BZAGEUC
  • SM-G991BZADEUC
  • SM-G991BZWGEUC
  • SM-G991BZIGEUE
  • SM-G991BZVDEUE
  • SM-G991BZADEUE
  • SM-G991BZIDEUE
  • SM-G991BZWDEUE
  • SM-G991BZVGEUE
  • SM-G991BZAGEUE
  • SM-G991BZWGEUE
  • SM-G991BZADEEB
  • SM-G991BZADEUH
  • SM-G991BZIDEUH
  • SM-G991BZVDEUH
  • SM-G991BZWDEUH
  • SM-G991BZAGEUH
  • SM-G991BZWGEUH
  • SM-G991BZVGEUH
  • SM-G991BZWGEUA
  • SM-G991BZIGEUA
  • SM-G991BZVDEUA
  • SM-G991BZWDEUA
  • SM-G991BZADEUA
  • SM-G991BZVGEUA
  • SM-G991BZIGEUC
  • SM-G991BZADEEH
  • SM-G991BZADTUR
  • SM-G991BZIDTUR
  • SM-G991BZVDTUR
  • SM-G991BZWDTUR

Similar Models

Frequently Asked Questions

What is the latest Android version for SM-G991B?

The newest firmware for SM-G991B runs Android 15: build G991BXXUJHZF2, released on July 9, 2026.

When did SM-G991B get its last update?

The latest build for SM-G991B, G991BXXUJHZF2, was released on July 9, 2026 (3 months ago).

How often does SM-G991B get updates?

Over the last 12 months SM-G991B received 4 builds, with at least one new build in 4 different months.

Is the firmware for SM-G991B official?

Yes, all firmware files for SM-G991B are 100% official, original, and obtained directly from Samsung servers.

How to flash Samsung SM-G991B using Odin?

To flash SM-G991B, 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-G991B?

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-G991B.