Introduction to the Unit
You can determine what is wrong with your device by looking at the front panel:
| LED | COLOR | STATUS | DESCRIPTION |
| Power | Green | On | The device is receiving power and is functioning properly. |
| Blinking | The device is in the process of starting up or restoring the default settings. | ||
| Off | The device is not receiving power. | ||
| Internet | Green | On | The device's WAN (Internet) connection is ready. |
| Blinking | The device is sending/receiving data through the WAN (Internet). | ||
| Off | Off | The WAN (internet) connection is not ready or has failed. | |
| LTE | Green | On | The device is registered and successfully connected to a 4G network. |
| Blinking (slow) | The device is registered and successfully connected to a 2G/3G network. | ||
| Blinking (fast) | The device is looking for an available 4G/3G/2G network. | ||
| Off | Off | There is no SIM card inserted, the SIM card is invalid, the PIN code is not correct or there is no service. | |
| LTE signal strength | Green | On | A valid SIM card is inserted and the wireless WAN interface (LTE internet) is enabled. Signal Strength: Excellent (RSRP - Reference Signal Receiving Power) >= -79 dBm |
| Orange | On | Signal Strength: Fair / RSRP >= -81 to 95 dBm |
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| Red | On | Signal Strength: Poor / RSRP >= -97 dBm |
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| Blinking | There is no LTE signal because there is no valid SIM card inserted and/or the internet connection (WAN interface) is disabled. | ||
| WLAN/WPS | Green | On | The device is ready and the 2,4 GHz wireless LAN is on, but is not sending/receiving data through the wireless LAN. |
| Blinking (slow) | The device is sending/receiving data through the wireless LAN (WiFi). | ||
| Blinking (fast) | The device is negotiating a WPS connection with a wireless client. | ||
| Off | Off | The wireless LAN (WiFi) is not ready, has failed or WPS is disabled. | |
| LAN | Green | On | The device's LAN connection is ready. |
| Off | Off | The LAN connection is not ready or has failed. |
Login to Web GUI
Log in to the Web GUI of the router (usually via 192.168.1.1) with the username (admin) and password (1234):
Then change the password to something you will remember in the future:
he Web Configurator’s main screen is divided into these parts:
Accessing the Wizard
Click the Wizard icon in the top right corner of the web configurator to open the Wizard screen.
- The first wizard screen displays the main steps in the wizard setup. Click Next to proceed with the time zone setup screen.
- The Zyxel Device automatically detects your location and displays the correct time zone. If the result is not correct, click Detect Again or manually select the time zone of Zyxel Device’s location and click Next.
- Enter your APN (Access Point Name) provided by your service provider. Select the country where the Zyxel Device is located and your service provider name. Click Next.
- Use this screen to enable or disable the Zyxel Device’s wireless LAN, and enter the wireless network name (SSID). Select a channel or use Auto to have the Zyxel Device automatically determine a channel to use. Click Next.
- Select WPA2-PSK and enter a pre-shared key from 8 to 63 case-sensitive characters for data encryption. The wireless clients which want to associate with this wireless network must have the same wireless security settings. Otherwise, select No Security to allow any client to associate with this network without any data encryption or authentication. Click Next.
- Use the read-only summary table to check whether what you have configured is correct. Click Apply Settings to save your settings. Otherwise, click Back to go back to the previous screens.
Troubleshooting - Reset Device
Firstly, if you haven't done many changes to the configuration of the unit, I would start with a reset of the unit - by pressing and holding the button for 20 seconds:
This would reset the device back to factory reset, where your WiFi and admin password will go back to the factory default which you can find under the device.
Troubleshooting - Sim-Card PIN-code
If you have a SIM card with a PIN code, you might need to enter it into the device.
Note: Entering the wrong PIN code 3 consecutive times locks the SIM card, after which you need a PUK (Personal Unlocking Key) from the service provider to unlock it.
If you don't know if you have a PIN code, try inserting the SIM card into your mobile phone. If it doesn't ask for a PIN code, you don't have one.
Navigate to the B section to Configuration -> Network -> WAN -> PIN Management and enter the PIN code. If you don't want the device to require a PIN every time you restart the unit, set the PIN-code Request function to "Disable" and hit apply.
After you have entered the PIN Code in the box, press "Apply".
Troubleshooting - Enter APN settings manually
If you are still having problems after resetting the unit, you might need to enter the APN information of your SIM card manually in the device. You can find the APN information by calling your service provider (ISP).
Go to -> Network -> WAN -> WAN management -> Modify -> Dial Up-profile and choose "Manual"
When you click on manual, you will find the APN settings which you can enter manually by inserting the information that your service provider can give you.
Try another sim-card
You can also try to use another SIM-card in the unit to see if the SIM-card you have is faulty. You can also insert the LTE SIM-card into a mobile phone and see if you get a signal.
Troubleshooting - Firmware Upgrade
Upgrading firmware to the latest version could help with your issue because your device's software is not running the latest modifications.
Go to this website to download the latest firmware LTE3301-PLUS Download Link
Extract the zipped file you have downloaded with the built-in extractor of your operative system (or Winzip, 7-zip)
Login to the Web GUI of the LTE3301 using this guide: Accessing your router via Web GUI
Go to Maintenance-> Firmware upgrade and then click on Browse... and choose the .bin file you have extracted
Click on upload and let the firmware be updated, this can take up to 3 minutes (DO NOT TURN OFF THE DEVICE)