The Samsung A057F (Galaxy A05s) displays the error “All binaries are not allowed to be flashed due to KG locked” because the Knox Guard (KG) lock is active. This security feature prevents flashing or modifying the device firmware until it is unlocked.
Solution to KG Locked Issue
1. Check KG Status
- Boot into Download Mode (Volume Up + Volume Down + USB cable).
- Look at the KG Status:
- “Checking”: The device is locked due to security policies and must be connected to the internet.
- “Prenormal”: The device must remain connected to the internet for 7 days before unlocking.
- “Active”: The device is fully locked and requires an official unlock from Samsung or the original owner.
2. Connect to the Internet & Wait
- If the KG status is “Checking” or “Prenormal”, insert a SIM card with an active internet connection and leave the device connected for 24-72 hours.
- The lock will be lifted automatically once Samsung’s servers verify the device.
3. Use ADB or Fastboot (If Possible)
- Enable USB Debugging (if possible).
- Try removing the KG lock using ADB commands
- :shCopyEdit
adb devices adb reboot bootloader fastboot oem unlockThis may not work on newer security updates.
4. Flashing via Odin (After KG Unlock)
- Once the KG lock is lifted, you can flash official firmware using Odin.
5. Knox Guard Removal (If Official)
- If this device is company-owned or locked by a carrier, contact Samsung or the service provider to remove Knox Guard.
⚠ Warning: Bypassing Knox Guard using unauthorized tools can permanently lock or brick your device. Always use official methods when possible.
SOLUTION HERE FOR A057F ALL BINARY
Tool MDM FIX
- Open tool
- EDL mode
- Remove KG
- Phone will boot
- Boot in download mode
- Flash official file
