Most Huawei E5785-92c units are locked via software. When you insert a SIM card from a different carrier, the device's web interface (usually 192.168.8.1) will prompt you for an or NP Code .
: Used to remove the main network restriction. huawei e578592c unlock
Huawei provides an official unlock code for its devices. To obtain the code: Most Huawei E5785-92c units are locked via software