Apart from FRP, Version 3.0 has expanded into a multi-tool suite. It now includes modules for:
Disclaimer: Only use this on devices you own. Bypassing FRP on a stolen device is illegal. samfw frp tool 3.0
Fix: You are using the wrong driver. Use the "Driver" tab inside the tool to install the CDC Serial or Samsung USB drivers again. Apart from FRP, Version 3
One of the biggest frustrations with FRP removal is driver conflicts. Version 3.0 includes an automatic driver checker and installer. If your Samsung device isn't detected, the tool diagnoses the issue instantly. Legality: It is 100% legal to use this
Safety: Yes, for your device. No, for your PC's antivirus.
Legality: It is 100% legal to use this tool on phones you own. It is illegal to use it on a lost/stolen phone to bypass the owner's Google lock.