When you are looking at the list of Wi-Fi hotspots to connect to, it can be quite long. If there is more than 1 hotspot visible to your computer, tablet or phone, it is likely that some of the hotspots use the same channel and this will either make it difficult or impossible to connect. If you can see more than 6 hotspots, it is very likely that they are sharing channels and it will be very difficult or impossible to connect. If you see more than 12 hotspots, it will be almost impossible – settle for a coffee and read a book instead, it just doesn’t work.