How To Open Bootloader Mode On Samsung Galaxy A15 !exclusive!

Release both buttons the moment the appears on the screen. After a few seconds, the Android Recovery menu will load. Galaxy A15: How to Boot Into Android Recovery

You want root access, custom kernels, ad-blockers, full system backups, or plan to install custom ROMs like LineageOS. How to Open Bootloader Mode on SAMSUNG Galaxy A15

You rely on banking apps, Netflix HD (Widevine L1 often falls to L3), or Samsung’s secure ecosystem. Release both buttons the moment the appears on the screen

To actually the bootloader:

Use a high-quality USB 2.0 to Type-C data cable . full system backups