How to Lock Bootloader Samsung Galaxy A50s

September 19, 2019 | By Kireina | Filed in: Android.

How to Lock Bootloader Samsung Galaxy A50s without Trigger KG State / RMM state Prenormal? If you flashed ROM of Samsung Galaxy A50s, the bootloader are locked and If you want to lock the bootloader again. 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 how to lock the bootloader. For unlocking Bootloader visit this post How to unlock bootloader Galaxy A50s.

Step by step to Lock Bootloader Galaxy A50s :

  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 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 A50s

Enter Download Mode ( Connected USB Cable to PC, Turn Power off the phone, Press and hold Volume Down + Volume Up 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 Lock Bootloader Galaxy A50s

  1. Lock Bootloader : In Download Mode you see the long press Vol Up option to enter Device Unlock Mode. Lock the bootloader ( that will wipe your device so be sure to backup of your data )
  2. Read description on the Lock Bootloader screen then use Volume UP to select “YES” to confirm Lock Bootloader and Factory reset phone. “No” to cancel Lock bootloader and restart the phone.
  3. After Bootloader locked, 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 Locked!

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 Lock the boot loader.


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