Run the tool as Administrator. Click Refresh or Check Button to see if the software detects your modem's IMEI and firmware version. Unlocking: Select your "Algorithm" (try "Auto-detect" if available). Click Unlock or Calculate .
Yes, except for CDMA networks (Verizon, Sprint) – V577 is GSM/LTE only. Also check band compatibility. huawei+modem+unlocker+v577+work