Hey Kaz, Do have trouble connecting to Wifi when trying to update your device's system software. Is this a home Wifi hotspot for which you have the correct network key (and an activated Samsung Account on your device)? Do remember that you can also update your device's software to the latest available version using the Samsung device programe called "Kies". This you should download and install onto your PC or Mac - it will then search for available system software updates and accordingly let you know. If your device be elegible for any updates available, then you will be given the option to proceed with the update.