Unlock Bootloader Samsung Galaxy S10 5G SM-G977B Android 9 Pie

How to Unlock Bootloader Samsung Galaxy S10 5G SM-G977B without Trigger KG State / RMM state Prenormal? If you want to flash ROM, you need to unlock the bootloader, unlocking bootloader on Galaxy S10 5G, it does not enough by enabling OEM unlock option although KG State / RMM State is not Prenormal and OEM unlock option is enabled. This method will wipe all data on internal storage. So, make sure to backup your important data! the data can not be recovered. Watch the video in the bottom of this post.

Step by step to Unlock Bootloader Galaxy S10 5G SM-G977B

  1. Enable Developer Options: go to Settings -> About device. Tap 7 times on Build number to enable Developer options.
  2. Enable OEM unlock and USB debugging options ( Settings -> Developer options )
  3. Download and Extract ODIN from https://odindownload.com/SamsungOdin/
  4. Download and Install Samsung Mobile Phone Drivers ( ignore this if you have installed it ) : http://developer.samsung.com/technical-doc/view.do?v=T000000117

How to Enter Download Mode Galaxy S10 5G SM-G977B

Enter Download Mode ( Connected USB Cable to PC, Turn Power off the phone, Press and hold Volume Down + Bixby keys together then while pressing these keys connecting the phone to PC with USB Cable Data, release all keys when Download Mode appears ).

How to unlock Bootloader Galaxy S10 5G SM-G977B

  1. Unlock Bootloader : In Download Mode you see the long press Vol Up option to enter Device Unlock Mode. Unlock the bootloader ( that will wipe your device so be sure to backup of your data )
  2. Read description on the Unlock Bootloader screen then use Volume UP to select “YES” to confirm and “No” to cancel unlock bootloader and restart the phone.
  3. After Bootloader unlock, the phone will reboot and make sure the phone connected to the internet or triggers KG State / RMM State Prenormal.
  4. Setup the phone without google account etc.
  5. The Bootloader are unlocked!

Notes / Warning!

  1. Use at your own risk, I’m not responsible for bricking your device.
  2. Make sure to backup your important data before unlock the boot loader.

You can watch this video for Galaxy S10 5G unlocking bootloader method. For S10 to enter download mode press Volume Up + Bixby key then connect to PC.

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