S21 5G SM-G991U1

What is the difference between 1 file firmware and 5 files:
It is known that when you download any firmware for your Galaxy device from sites known to download the firmware such as Sammobile, the firmware contains one file where it updates the Android operating system without deleting anything and the file is used by the Odin Tool in box AP.
But there are firmware of another type are characterized by being more comprehensive and larger containing four files and they are BL-AP-CP-CSC-CSC HOME, They are called several labels: Repair Firmware-Full Firmware-Factory Firmware-Factory Roms,These files are flashed by the Odin tool in the following order BL=BL_G991U1 - AP=AP_G991U1 - CP=CP_G991U1 - CSC/CSC_Home=CSC_G991U1.

What is the difference between CSC or CSC HOME:

CSC: It is the file responsible for the languages ​​of the device but when used it will delete all files on the device (lost data).
CSC HOME: It is the file responsible for the languages ​​of the device, but when used will not delete anything from the device (unformat).

Firmware Link
(USA, Sprint, T-Mobile, Verizon, AT&T, Anritsu, Tracfone, ACG / CSpire, MetroPCS and Cricket Wireless....)↓
  • G991U1UEU1ATLI / OYM1ATLI v11
  • G991U1UEU1AUA3 / OYM1AUA3 v11
  • G991U1UEU1AUAG / OYM1AUAG v11
  • G991U1UEU2AUB6 / OYM2AUB6 v11
  • G991U1UEU2AUC8 / OYM2AUC8 v11
  • G991U1UEU3AUDD / OYM3AUDD v11
  • G991U1UES3AUE3 / OYM3AUE3 v11
  • G991U1UEU4AUF5 / OYM4AUF5 v11
  • G991U1UES4AUFD / OYM4AUFD v11
  • G991U1UEU4AUGE / OYM4AUGE v11
  • G991U1UEU4AUGQ / OYM4AUGQ v11
  • G991U1UES4AUH9 / OYM4AUH9 v11
  • G991U1UEU4AUI7 / OYM4AUI7 v11
  • G991U1UES4AUIN / OYM4AUIN v11
  • G991U1UES4AUJ7 / OYM4AUJ7 v11
  • G991U1UEU4BUK7 / OYM4BUK7 v12
  • G991U1UEU4BUKF / OYM4BUKF v12
  • G991U1UES4BUKK / OYM4BUKK v12
  • G991U1UES4BULE / OYM4BULE v12
  • G991U1UEU5BULH / OYM5BULH v12
  • G991U1UES5BVA6 / OYM5BVA6 v12
  • G991U1UES5BVC1 / OYM5BVC1 v12
  • G991U1UEU5CVC4 / OYM5CVC4 v12
  • G991U1UES5CVCB / OYM5CVCB v12
  • G991U1UEU5CVDC / OYM5CVDC v12
  • G991U1UEU5CVE8 / OYM5CVE8 v12
  • G991U1UEU5CVF1 / OYM5CVF1 v12
  • G991U1UES5CVF5 / OYM5CVF5 v12
  • G991U1UEU5CVGB / OYM5CVGB v12
  • G991U1UEU5CVH9 / OYM5CVH9 v12
  • G991U1UES5CVHB / OYM5CVHB v12
  • G991U1UES5CVI8 / OYM5CVI8 v12
  • G991U1UEU5DVK3 / OYM5DVK3 v13

How To Flash G991U1
  • Download and install Samsung Driver USB.
  • Download the Odin tool 3.13 and then extract it.
  • Download the Firmware and extract it.
  • Download Pit file G991U1 depending on the problem of the device you have in case there are no problems in flashing do not use the file.
  • Open odin tool And from the BL box we choose the file BL=BL / AP=AP / CP=CP / CSC=CSC or CSC_HOME, What is the difference between the two files explained at the top.
  • Now boot the device into download mode with Volume Down + Volume Up and connect the Type-C USB cable to device.
  • Connect the device to the computer and press Start.
  • The process will take a few minutes so be patient and never disconnect the cable.
  • After the flash is finished, the device will automatically restart.
  • It will take about 10 minutes to boot the Android device so don't worry.
  • After the boot process is finished, the Setup Wizard will appear.
  • Complete the settings, Congratulations on successfully flashing the device.

You can always contact us in case you encounter any problems and we will be happy to answer you