You're right to find interesting—it's a widely used utility in the mobile repair and tech enthusiast community. Its primary purpose is to bypass FRP (Factory Reset Protection) on Samsung and other Android devices. FRP is a security feature that locks a phone after a factory reset unless the previous Google account credentials are entered.
: On the phone's lock screen, go to "Emergency Call" and dial : In the SamFw tool, click "Remove FRP" Authorization samfw frp tool 3.0