The Z3x toolset is primarily used for deep-level software maintenance and repairs that standard consumer tools cannot perform:
The official Z3x software typically requires a physical Z3x Box or Dongle with a smart card to function.
Using these tools can void device warranties and carries the risk of "bricking" a device if used incorrectly. Source Reliability Warning
Removing Factory Reset Protection (FRP) locks if login credentials are forgotten after a reset.
Restoring corrupted IMEI numbers or serial numbers after software failures.
It is highly recommended to use the official Z3X Team site for legitimate downloads and activations. Samsung Tool Pro - Z3X-TEAM