: Sometimes other GSM boxes or dongles create conflicts. Unplug everything except the Z3X box and try again.
Disclaimer: This guide is intended for educational purposes on servicing devices you own. Using box tools for illegal activities is prohibited. z3x box samsung tool pro card not found exclusive
: Remove the smart card from the box or dongle and gently clean the gold contacts with a soft eraser or rubbing alcohol. Try Different Ports : Sometimes other GSM boxes or dongles create conflicts