While our laptops and desktop computer connect fine to the wifi the samsung phone and tablet quite often don't connect for up to half an hour and then suddenly they do. Sometimes they connect straightaway. Any ideas please?
Have you made sure the tablet is fully updated? If not I would make sure it is updated before proceeding.
Then try removing all data for the network you are trying to connect to from your tablet and then reboot your router/modem. Even though it works for other devices, this is something that you should do. Once it is fully reloaded, then re-add the data to the tablet and try to connect to the WiFi.