[NoControl]

You still gonna wanna press the red button in the back and hold it for 30secs+ to reset te internal memory otherwise your internet will keep droping out, hada similar issue last week. In my case I had set up mom n pops router and it used my laptops IP address and when I came home my router was trying to use my ip address, so the ISP was having a conflict betwen the 2 routers, and in your case since you got the router used it may still have your buddys ip on it which will make your connection coneect and disconnect like a mofo. Hopefully I didn't confuse you and you understood all that.