: In the "Options" tab, ensure Auto Reboot and F. Reset Time are the only ones checked. Do NOT check "Re-Partition" unless you have a .pit file.
: Used to unbrick devices stuck in a boot loop by flashing the original factory software.
: Your phone must be in its specific "Download Mode" (not Recovery Mode). This usually involves holding Volume Down + Power (or Bixby) while plugging into a PC.
: Often the first step in gaining root access by flashing a modified boot image or kernel. Key Slots and Their Meaning