Be sure to power off and on the router after making and saving changes as some settings happen on the next power up. Also allows for you to ensure the changes took place and if you have a power outage, the router will work the same on the resumption of power. Sometimes on the device, you need to forget (delete) the network setting and reestablish it especially when using the same SSID and password that was used on a different router. Also some devices only connect to one of the networks so be sure it supports the one you are trying to connect to, either the 5 GHz or the 2.4 GHz.