Many devices which don’t even use Wi-Fi still emit radio signals in the same bands (2.4 GHz or 5 GHz) as your Wi-Fi router. Like this, there are fewer obstacles (and people) in the way of your Wi-Fi signals. Moreover, it is better to put your router on an elevated surface: a desk or shelf rather than the floor. Try and place your router in the middle of the space you want to cover to make the signal stronger everywhere. Where you put your router is one of the most important contributors to good-or bad-Wi-Fi coverage and signal strength. Here are some of the most common causes of Wi-Fi interference and what you can do about them. Do you sometimes experience slow Internet speed, poor signal, intermittent connections or unexpected disconnections? One of the most common causes of these problems could be Wi-Fi interference.