Showing the 2.4GHz wifi signals available from our apartment.
Wifi routers are supposed to find an open channel; however, in many cases, they are not set to do so automatically. Neighbours can also come and go or update equipment. Therefore, you may wish to occasionally check.
It is easy to find an app for your phone which will scan or analyze these frequencies. Just search for "wifi analyzer" in your app store for a multitude of free options. You may have both 2.4 and 5GHz bands to check. If you find other wifi signals on the exact same channel as yours, and if they're physically close, you may find it worth your time to have someone modify your setup. I switched channels on my WINDTALKER-5GHz last night.