This article will give you an overview of the LTE3301-PLUS as well as a troubleshooting guide to help you understand the device and help you with any problem you might encounter.

Table of Content

A) Introduction to the Unit

B) Troubleshooting the unit

1) RESET the unit
2) Enter the PIN-code of the sim-card
3) Enter APN-settings manually
4) Firmware Upgrade the device

C) Port Forwarding 

A) Introduction to the Unit

You can determine what is wrong with your device by looking at the front panel:

B) Troubleshooting the unit

Let's look at some ways you can solve the issues you're having.

1) RESET the unit

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.

2) Enter the PIN-code of the sim-card

If you have a sim-card with a PIN-code, you might need to insert the PIN-code into the unit.

If you don't know if you have a PIN-code or not, try inserting the sim-card into your mobile phone, if it doesn't ask for a PIN-code, you don't have one.

Login to the unit by connecting your computer to the WiFi of the LTE3301-PLUS and enter http://192.168.1.1 using your browser and use the username admin and password 1234:

If you get problems, use this article: Accessing your router via Web GUI

Navigate to the B section to Configuration -> Network Setting -> Broadband -> Cellular SIM 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".

3) 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). 

Login to the unit and go to configuration -> Network Setting -> Broadband -> Cellular WAN -> Click "APN Manual Mode"

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.

3) 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.

4) Firmware Upgrade the device

Firmware upgrading to the latest version could help with your issue because it's not running the latest modifications to the software of the device.

1) Click on this link below to download the latest firmware
LTE3301-PLUS Download Link

2) Extract the zipped file you have downloaded with the built-in extractor of your operative system (or Winzip, 7-zip)

1) Login to the Web GUI of the LTE3301 using this guide: Accessing your router via Web GUI

2) Go to Maintenance-> Firmware upgrade and then click on Browse... and choose the .bin file you have extracted

3) Click on upload and let the firmware be updated, this can take up to 3 minutes (DO NOT TURN OFF THE DEVICE).

C) Port Forwarding 

What is port forwarding? 
The most common usage of a port forwarding is when you want to reach a NAS (192.168.1.34) or a server in your network on the HTTPS (443) port, then the request coming from the PC (Originating IP 94.33.45.234) at work, have to be forwarded to the right device (192.168.1.34) in your home when a request is coming on the port 443:

A big misconception is that you are opening a port on your router, but that's not true. You are forwarding a port to a device in your network to be able to access it. It is important that you either limit the source IPs (Originating IP) to the trusted IPs connecting from the internet, or create really good security on the device/server you port forward to.

What does it mean?
Status: Is the port forward active or not? 
Service Name: The name of the port forwarding rule
Originating IP: The source IP (where the public IP is coming from on the internet site)

WAN Interface: What public WAN interface to be triggered when a port forwarding is happening
Server IP address: The device in your network for which the router is going to forward the traffic to
Start Port: What external starting port do you want to forward
End Port: What external ending port do you want to forward (if it's only one port, e.g. HTTPS 443, then select 443 on both the start port and the end port).
Translation Start Port: What internal starting port do you want to forward
Translation End Port: What internal ending port do you want to forward (if it's only one port, e.g. HTTPS 443, then select 443 on both the start port and the end port). This is in most cases configured as the same as the start port and end port