| Factory reset (Hard reset) | Steps to reset Huawei E5331 to factory settings1. For battery powered devices, the device should not be connected to the wall charger/usb cable2. Remove the battery cover 3. Find a paperclip or a pen, small enough to fit into the reset pinhole 4. Press and hold the reset button in the pinhole for 5 seconds |
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| Firmware | Firmware link |
| Default username | admin |
| Default password | admin |
| Default IP address | 192.168.1.1 |