This indicates the software cannot detect your Z3X smart card. Re-seat the card inside the dongle/box, try a different USB port, and reinstall the smart card drivers.

This specific version, v3.5.0040, was released around September 2012 and added support for models such as the , enabling operations like flashing, code reading, unlocking, and IMEI repair (in TAT mode) on these devices. It is also compatible with models like the GT-C3300 and GT-S5270.

regsvr32 C:\Windows\SysWOW64\mscomm32.ocx

Connect the specific service cable to the phone's charging/data port and attach the other end to the PC or Z3X Box. Step 4: Execute the Operation

Remove the battery, wait 5 seconds, and reinsert it (do not power the phone on unless instructed by the software).

Carefully follow all on-screen instructions during the process to avoid errors.