From here, you can download Huawei Modem Code Writer V1.0b by sagmaster. This software is used to input the unlock code into Huawei modem / router. It works on COM port of the Huawei device.
Disclaimer : Administration of routerunlock shall not be liable in case of unknowing change of the firmware of your modem / router / MiFi. Moreover, if you want any specific firmware of related to Huawei dongle / Pocket MiFi, then leave a comment, if it will be available then will be published. All the firmware which are posted at routerunlock, are free of cost and there is no need to pay anyone.