Do not unplug it immediately. Wait at least 15 minutes. If it is completely frozen, unplug it, hold down the reset button, replug it, and attempt the update again using Method 2. 3. IP Address Inaccessible After Update
If the update fails, you may need to perform a hard factory reset by holding the reset button (usually a small pinhole) for 10 seconds, then try the update process again.
Fix: You are likely attempting to flash firmware meant for a different variant of the LDW931. Verify the chipset model. Alternatively, check if the downloaded archive ( .zip or .rar ) needs to be unzipped first. Ldw931 Firmware Update
Fix: A solid red light usually indicates a network error or a bad flash. If the Web UI is inaccessible, you must use Method 2 to force-flash the stock firmware via a USB COM port.
Complete Guide to LDW931 Firmware Updates: Optimize Your 4G LTE USB Dongle Do not unplug it immediately
The update may have wiped out your APN profiles. Go to Network Settings > APN , and manually enter your network provider's configuration details. Conclusion
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Some flashing tools might be flagged as false positives by Windows Defender or third-party antivirus software. Step-by-Step Guide to Updating LDW931 Firmware