The Xbox One has built-in Wi-Fi, but it doesn’t always work. There are many circumstances that can prevent an Xbox One from connecting to Wi-Fi, including interference and obstructions, network issues, and even corrupt or incompatible router or modem firmware.

If an Xbox One won't connect to Wi-Fi, the problem can usually be narrowed down to three basic causes:

Each of these basic categories encompasses multiple different root causes, with multiple different solutions. If you suspect a specific type of problem, that is the best place to start your troubleshooting procedure. If you are unsure, just start at the beginning and work your way to the end.

Wireless networks are convenient, but they are less reliable than wired networks. A connection that works fine one day can suddenly stop working the next, and the cause is usually due to new obstacles or sources of interference.