I got several new devices over the holiday period, and was having trouble connecting to my router with several of them. I talked with Verizon and they sent me a upgraded router (from Gen1 to a Gen2, Rev I). It worked great - no more connection issues with my printer, Roku, Wii U, TV, or blu-ray devices that all had issues (other devices such as phones and laptops had worked fine).
Flash forward to now and suddenly I'm having the exact same connection issue with some of these devices again and I cannot understand why. I haven't changed a single setting on the router since everything was working and none of my devices have had any sort of changes or software updates.
The device that is a priority for me to get connected back fully is my Wii U so I can stream media and play online again.