ARRIS SURFboard mAX W21 AX6600

This was one of the worst purchases I have ever made. Router was very difficult to set up, the app was slow and constantly crashed or timed out. Tech support was terrible and cost me $40 on top of what I already paid for the device only to spend a week and countless hours with tech support that just told me the same thing. “Factory reset the device and uninstall/reinstall the app”) after doing that more than 20 times and tech support unable to fix the problem I returned this router.