G991BOXM3BUKG | Samsung firmwares by csc | EN

Download the latest Samsung firmware ✅ csc G991BOXM3BUKG. Full list of firmwares available for download

Showing 1-10 of 300 items.
Samsung firmware list
DeviceModelRegionPDA/AP VersionCSC VersionMODEM/CP VersionOs VersionBuild Date
Samsung Galaxy S21 5GSM-G991BXFV

SM-G991BXFVG991BXXS3BULC

One UI 4 Upgrade (Android 12)

One UI 4 brings you a wide array of new features and enhancements for your Galaxy devices. More intuitive, more fun, more secure, and easier than ever.

Check out the changes below.


Color palette

Customize your phone with unique colors based on your wallpaper. Your colors will be applied to menus, buttons, backgrounds, and apps throughout your phone.


Privacy

One UI 4 offers strong privacy protection to make sure your personal information doesn’t fall into the wrong hands.

Permission info at a glance
See when each app accesses sensitive permissions such as Location, Camera, or Microphone in Permission usage. You can deny permissions for any apps you don’t feel comfortable with.

Camera and microphone indicators
Keep prying eyes and ears away. A green dot will appear in the upper right corner of the screen when any app is using the camera or microphone. You...
G991BOXM3BUKGG991BXXU3BUKG12
Samsung Galaxy S21 5GSM-G991BXFA

SM-G991BXFAG991BXXS3BULC

One UI 4 Upgrade (Android 12)

One UI 4 brings you a wide array of new features and enhancements for your Galaxy devices. More intuitive, more fun, more secure, and easier than ever.

Check out the changes below.


Color palette

Customize your phone with unique colors based on your wallpaper. Your colors will be applied to menus, buttons, backgrounds, and apps throughout your phone.


Privacy

One UI 4 offers strong privacy protection to make sure your personal information doesn’t fall into the wrong hands.

Permission info at a glance
See when each app accesses sensitive permissions such as Location, Camera, or Microphone in Permission usage. You can deny permissions for any apps you don’t feel comfortable with.

Camera and microphone indicators
Keep prying eyes and ears away. A green dot will appear in the upper right corner of the screen when any app is using the camera or microphone. You...
G991BOXM3BUKGG991BXXU3BUKG12
Samsung Galaxy S21 5GSM-G991BPRT

SM-G991BPRTG991BXXS3BULC

One UI 4 Upgrade (Android 12)

One UI 4 brings you a wide array of new features and enhancements for your Galaxy devices. More intuitive, more fun, more secure, and easier than ever.

Check out the changes below.


Color palette

Customize your phone with unique colors based on your wallpaper. Your colors will be applied to menus, buttons, backgrounds, and apps throughout your phone.


Privacy

One UI 4 offers strong privacy protection to make sure your personal information doesn’t fall into the wrong hands.

Permission info at a glance
See when each app accesses sensitive permissions such as Location, Camera, or Microphone in Permission usage. You can deny permissions for any apps you don’t feel comfortable with.

Camera and microphone indicators
Keep prying eyes and ears away. A green dot will appear in the upper right corner of the screen when any app is using the camera or microphone. You...
G991BOXM3BUKGG991BXXU3BUKG12
Samsung Galaxy S21 5GSM-G991BSFR

SM-G991BSFRG991BXXS3BULC

One UI 4 Upgrade (Android 12)

One UI 4 brings you a wide array of new features and enhancements for your Galaxy devices. More intuitive, more fun, more secure, and easier than ever.

Check out the changes below.


Color palette

Customize your phone with unique colors based on your wallpaper. Your colors will be applied to menus, buttons, backgrounds, and apps throughout your phone.


Privacy

One UI 4 offers strong privacy protection to make sure your personal information doesn’t fall into the wrong hands.

Permission info at a glance
See when each app accesses sensitive permissions such as Location, Camera, or Microphone in Permission usage. You can deny permissions for any apps you don’t feel comfortable with.

Camera and microphone indicators
Keep prying eyes and ears away. A green dot will appear in the upper right corner of the screen when any app is using the camera or microphone. You...
G991BOXM3BUKGG991BXXU3BUKG12
Samsung Galaxy S21 5GSM-G991BPLS

SM-G991BPLSG991BXXS3BULC

One UI 4 Upgrade (Android 12)

One UI 4 brings you a wide array of new features and enhancements for your Galaxy devices. More intuitive, more fun, more secure, and easier than ever.

Check out the changes below.


Color palette

Customize your phone with unique colors based on your wallpaper. Your colors will be applied to menus, buttons, backgrounds, and apps throughout your phone.


Privacy

One UI 4 offers strong privacy protection to make sure your personal information doesn’t fall into the wrong hands.

Permission info at a glance
See when each app accesses sensitive permissions such as Location, Camera, or Microphone in Permission usage. You can deny permissions for any apps you don’t feel comfortable with.

Camera and microphone indicators
Keep prying eyes and ears away. A green dot will appear in the upper right corner of the screen when any app is using the camera or microphone. You...
G991BOXM3BUKGG991BXXU3BUKG12
Samsung Galaxy S21 5GSM-G991BTPL

SM-G991BTPLG991BXXS3BULC

One UI 4 Upgrade (Android 12)

One UI 4 brings you a wide array of new features and enhancements for your Galaxy devices. More intuitive, more fun, more secure, and easier than ever.

Check out the changes below.


Color palette

Customize your phone with unique colors based on your wallpaper. Your colors will be applied to menus, buttons, backgrounds, and apps throughout your phone.


Privacy

One UI 4 offers strong privacy protection to make sure your personal information doesn’t fall into the wrong hands.

Permission info at a glance
See when each app accesses sensitive permissions such as Location, Camera, or Microphone in Permission usage. You can deny permissions for any apps you don’t feel comfortable with.

Camera and microphone indicators
Keep prying eyes and ears away. A green dot will appear in the upper right corner of the screen when any app is using the camera or microphone. You...
G991BOXM3BUKGG991BXXU3BUKG12
Samsung Galaxy S21 5GSM-G991BTNL

SM-G991BTNLG991BXXS3BULC

One UI 4 Upgrade (Android 12)

One UI 4 brings you a wide array of new features and enhancements for your Galaxy devices. More intuitive, more fun, more secure, and easier than ever.

Check out the changes below.


Color palette

Customize your phone with unique colors based on your wallpaper. Your colors will be applied to menus, buttons, backgrounds, and apps throughout your phone.


Privacy

One UI 4 offers strong privacy protection to make sure your personal information doesn’t fall into the wrong hands.

Permission info at a glance
See when each app accesses sensitive permissions such as Location, Camera, or Microphone in Permission usage. You can deny permissions for any apps you don’t feel comfortable with.

Camera and microphone indicators
Keep prying eyes and ears away. A green dot will appear in the upper right corner of the screen when any app is using the camera or microphone. You...
G991BOXM3BUKGG991BXXU3BUKG12
Samsung Galaxy S21 5GSM-G991BTMZ

SM-G991BTMZG991BXXS3BULC

One UI 4 Upgrade (Android 12)

One UI 4 brings you a wide array of new features and enhancements for your Galaxy devices. More intuitive, more fun, more secure, and easier than ever.

Check out the changes below.


Color palette

Customize your phone with unique colors based on your wallpaper. Your colors will be applied to menus, buttons, backgrounds, and apps throughout your phone.


Privacy

One UI 4 offers strong privacy protection to make sure your personal information doesn’t fall into the wrong hands.

Permission info at a glance
See when each app accesses sensitive permissions such as Location, Camera, or Microphone in Permission usage. You can deny permissions for any apps you don’t feel comfortable with.

Camera and microphone indicators
Keep prying eyes and ears away. A green dot will appear in the upper right corner of the screen when any app is using the camera or microphone. You...
G991BOXM3BUKGG991BXXU3BUKG12
Samsung Galaxy S21 5GSM-G991BTMS

SM-G991BTMSG991BXXS3BULC

One UI 4 Upgrade (Android 12)

One UI 4 brings you a wide array of new features and enhancements for your Galaxy devices. More intuitive, more fun, more secure, and easier than ever.

Check out the changes below.


Color palette

Customize your phone with unique colors based on your wallpaper. Your colors will be applied to menus, buttons, backgrounds, and apps throughout your phone.


Privacy

One UI 4 offers strong privacy protection to make sure your personal information doesn’t fall into the wrong hands.

Permission info at a glance
See when each app accesses sensitive permissions such as Location, Camera, or Microphone in Permission usage. You can deny permissions for any apps you don’t feel comfortable with.

Camera and microphone indicators
Keep prying eyes and ears away. A green dot will appear in the upper right corner of the screen when any app is using the camera or microphone. You...
G991BOXM3BUKGG991BXXU3BUKG12
Samsung Galaxy S21 5GSM-G991BTMH

SM-G991BTMHG991BXXS3BULC

One UI 4 Upgrade (Android 12)

One UI 4 brings you a wide array of new features and enhancements for your Galaxy devices. More intuitive, more fun, more secure, and easier than ever.

Check out the changes below.


Color palette

Customize your phone with unique colors based on your wallpaper. Your colors will be applied to menus, buttons, backgrounds, and apps throughout your phone.


Privacy

One UI 4 offers strong privacy protection to make sure your personal information doesn’t fall into the wrong hands.

Permission info at a glance
See when each app accesses sensitive permissions such as Location, Camera, or Microphone in Permission usage. You can deny permissions for any apps you don’t feel comfortable with.

Camera and microphone indicators
Keep prying eyes and ears away. A green dot will appear in the upper right corner of the screen when any app is using the camera or microphone. You...
G991BOXM3BUKGG991BXXU3BUKG12

Specifications Samsung device G991BOXM3BUKG

  • Samsung Galaxy S21 5G SM-G991B
  • Display diagonal: 15.8 cm (6.2")
  • Display resolution: 2400 x 1080 pixels
  • Display type: Dynamic AMOLED 2X
  • Processor frequency: 2.9 GHz
  • RAM capacity: 8 GB
  • RAM type: LPDDR5
  • Internal storage capacity: 256 GB
  • Rear camera resolution (numeric): 12 MP
  • Rear camera type: Triple camera
  • SIM card capability: Dual SIM
  • Operating system installed: Android 11
  • Battery capacity: 4000 mAh
  • Product colour: Grey
  • Weight: 171 g

We recommend using Samsung’s own utilities, Samsung Smart Switch and OTA (Over-the-air), to upgrade devices. Use our site only if you are 100% sure about the risks involved in flashing your device csc: G991BOXM3BUKG. We is not responsible for any damage caused by using the files on this website.
The Firmwares provided here are all official Samsung's Android Firmwares and has NOT been modified by anyway as we get them directly from KIES servers.
We live-monitor all firmware updates for every Samsung device, in over 500 regions.
Beware, Manually flashing firmwares may brick your device, use it at your own risk and follow our tutorial steps.

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