In this guide we will explain the easy steps to boot into recovery and download modes on Galaxy S9 and S9+ with images. So you will always be able to reset your device from the ‘brick” condition, fix all the issues in the case if it is glitching, install updates, boot to bootloader, etc.
You may need to boot your Galaxy S9/S9 plus into Recovery mode if you decide to factory reset your phone or for example wipe cache partition that is often a must when troubleshooting persisting issues.