: Websites like doctorSIM or IMEI.info provide IMEI-based unlock codes for a fee.
Change your USB port (use a Rear port if on a Desktop) or try a different USB cable. zte z320 unlock nck dongle link
If you do not have the physical dongle, you can often request a free unlock code from your original service provider : Websites like doctorSIM or IMEI
To unlock a (often locked to MetroPCS or T-Mobile ) using software like an NCK Dongle , you generally need to put the phone into a specific communication mode so the PC can "talk" to it. While many technicians use the NCK Dongle for various ZTE models, the "complete story" for the zte z320 unlock nck dongle link
Most ZTE feature phones utilize the MediaTek (MTK) chipset .