Fixed IP SIM cards are a service that provides a 3G or 4G mobile broadband Internet service with a fixed IP address. This means that you can easily connect to your 3G or 4G router because you know the IP address.
You can have a public IP address which means that you can access your 3G or 4G router from anywhere on the Internet – in this case you will need to ensure that your router has a robust firewall and maybe something like Stealth mode which is featured on the Proroute GEM420 and other 4G routers which hides your router.
the other option is to have a Private Fixed IP Address SIM so you still get a fixed IP address but in order to access your router you will need to create a VPN from your PC to the Fixed IP SIM mobile network provider so you can access your devices securely over the VPN. with a private IP SIM you router is not accessible publicly on the Internet.
For Westlake Connect Fixed IP SIM card customers you can view some information about the Fixed IP SIM Card APN settings and 3G / 4G router configurations below.
Westlake Fixed IP SIM Cards APN Information including guide for Proroute H820 WRT and H685 WRT 3G / 4G Router APN configuration and port forwarding.
Teltonika RUT500 Fixed IP SIM Card APN Configuration, remote admin and port forwarding