YF325 Houston Texas 

It’s a 4G cellular Modem that lets you insert a SIM card into it and it gives you 4G access to the internet. The main thing most people would be interested in this device for would be that it has an RJ45 jack on it that lets you plug in network devices like a computer or credit card processing terminal that doesn’t have WIFI, OR any device that needs to connect to the network via RJ45 Ethernet Network Cable. 

This is what it looks like 

So, as we can see it has two SIM slots on the front, and two 4G SMA antenna jacks, as well as one local WIFI antenna. 

The thing that makes this unit so attractive is the LAN port that allows you to plug in devices that need the internet but have no WIFI built in or / and have no way of adding WIFI to them.  

So with this device you can connect a wires device like a desktop computer, credit card processing machine, camera system to cellular internet service where wired internet service like Comcast / Xfinity, or AT&T can't provide services to.