Have you successfully unlocked your Huawei stick? Let me know in the comments which carrier you escaped from!
Unlocking the Huawei E8372h-608 (commonly known as the Telstra 4G USB+WiFi Plus or Telenor 4G Wingle) involves a multi-step process of downgrading the firmware to bypass restrictions and then installing universal software. Prerequisites & Tools e8372h-608 unlock firmware
If the device won't enter download mode, try using a COM Port Switcher tool before flashing. Have you successfully unlocked your Huawei stick