Hey, I am sharing my internet with another person in the household who's a tenant in my house. He installs this device called a wall plug bridge xe102 next to the router. I know he uses VOIP of some sort. Ever since he installed that device, my internet has been really slow and sometimes i can't connect. He claims that VOIP doesn't use a lot of bandwidth and that device just makes the internet more efficient for videos. Every time i take that device off my internet goes really fast. I'm not very familiar with this VOIP, I'mma need some input. thanks!