You can also update/change your Wi-Fi name/password to kick all devices off your network.Keep in mind, if you do this though, you will have to reconnect every device back onto your newly updated Wi-Fi credentials which I know sometimes can be complic...
Hey wrh7787, compatible modem list can be found here and also hereI'd say any ARRIS, Motorola, or Netgear modem would be solid since they are reputable brands; whatever fits your budget
Hey mahanna1. I was looking at different topics and found this help thread for your question, hope it helps. You should be able to click here to view it.