Disclaimer: Unlocking a device may void warranty (though this is less relevant for legacy devices) and must be done in accordance with local laws regarding mobile device unlocking.
A 16-digit unlock code calculator is a software tool that generates a unique unlock code for your ZTE MF60 modem. The calculator takes into account the modem's IMEI (International Mobile Equipment Identity) number, which is a unique identifier assigned to every mobile device.
: If connected to a PC, some tools can fetch it automatically by dialing *#06# via a virtual terminal. Tools for Calculating the Unlock Code