Hi vbrown801. We understand in-home WiFi can be a bit tricky to improve. Please take a moment to review this friendly article on our website. It's about: Improving WiFi Network Performance
Also, if you need a new modem replacement for a modem you rent from us, I can help place an order. To get started, please send me a private message and include your full name and service address, so I can assist you. You can click my name (ComcastJoeTru) to view my profile, and then click "Send a private message" in the upper right.