Unlock Huawei B311221 - Install Fix

Disclaimer: Unlocking may void your warranty or violate your ISP's terms of service. Proceed at your own risk. Always back up your original settings.

After installing the custom firmware:

Before we touch the "Install" button, we need to diagnose the problem. unlock huawei b311221 install

The SIM card slot is typically located behind a small cover on the side or bottom of the device. Disclaimer: Unlocking may void your warranty or violate

Before you begin, ensure you have the following: After installing the custom firmware: Before we touch

| Error | Likely Cause | Solution | |-------|--------------|----------| | | Wrong code for your firmware | Use DC-Unlocker direct unlock instead. | | Router not detected via USB | Missing drivers | Reinstall HiLink USB drivers; disable antivirus. | | Band locking page is blank | Stock firmware | Install custom WEBUI (Part 4). | | After unlock, still “No Service” | APN missing or wrong band | Manually set APN in Settings → Dial-up → APN . | | DC-Unlocker says “No modem found” | Router in HiLink mode | Change to “Modem mode” via USB settings (tick “Allow USB tethering”). |