Samsung Galaxy A41 (samsung-a41)

Unlocking the bootloader
Unlocking the bootloader on these samsung phones is a bit weird, and there is a lot of conflicting information available.

1. Make sure everything important is backed up as everything will be wiped

2. Turn on "OEM Unlocking" inside developer options.

3. Turn off the phone.

4. Press both volume up and volume down and plug in the USB cable (can be charger) to enter download mode.

5. When in download mode long press the volume up key to enter unlock mode.

6. In the next screen press the up volume button until the phone restarts.

7. Now that you might think that it is done, Samsung has another surprise for us, VaultKeeper. To make it allow flashing unverified images you must go through the first time setup and connect to an internet connection.

8. After that enter the developer settings again and verify that "OEM Unlocking" is enabled and greyed out.