| Feature | Stock Firmware | Custom Firmware (e.g., OpenWRT Ufi) | | :--- | :--- | :--- | | | Basic, often ugly | Advanced LuCI web interface | | Band Locking | Usually locked | Full control (lock to Band 1,3,5,7,20,40) | | IMEI Repair | Impossible | Possible via AT commands in SSH | | Tethering Mode | Limited to Wi-Fi | Ethernet over USB (RNDIS) + Wi-Fi | | Risk | Low | High (brick chance if wrong build) |