Huawei Modem Code Writer [better] -

Most modems only allow 10 failed attempts. If you exceed this, the modem will be "Hard Locked," requiring a more advanced reset or "Flash Code" to clear.

What is the of your Huawei modem (e.g., E3372, E5573)? Do you already have the IMEI-based unlock code ? Are you trying to use it on a Windows or Mac/Linux machine? HUAWEI MODEM Code Writer Download Huawei Modem Code Writer