Today we have got a software for ZTE which will help to send the unlock code / NCK in your ZTE Modem Dongle Step by step guide to unlock ZTE Modem Dongle Free : Download the compatible unlocking software from the download link which is provided at the end of the article. But for ZTE there are a few unlocking tools are available. ZTE Modem Unlock Code Calculator/ Writer Unlock ZTE Free – There are so many unlocking tools available for Huawei modems.