There is the possibility that there are too many users of the same wireless channel in your area or that your wireless phone base station is too close to the router and is interfering. Move the wireless phone if necessary. Then in the router there are configurable channels for the radio communication channels 1, 6 or 11 are preferred. If you see other routers in the area and it shows the channels they are using choose a channel probably 1 or 11 that they are not using. If the first try does not work try the other.