The short answer is: The long answer involves understanding the risks of low-level programming.
Qualcomm Tool Master v3.0 refers to a community-developed utility, often distributed as a command-line script (such as Qualcomm-Tool-V3.0-RC5-[HadiK-IT].cmd qualcomm tool master v3.0
: Support for Galaxy S24+ (SM-S926U/W), Galaxy S21 series, and Tab A9+ models. The short answer is: The long answer involves
: Back up your full firmware or specific partitions. Galaxy S21 series