Read http://forums.cnet.com/7723-13973_102-560420/wifi-disconnects-from-time-to-time-galaxy-tab-7-plus/?tag=contentBody;threadListing for one reason. We know a few others such as a hidden SSID and then we have to talk about Netgear's current problems.
There is a bug Netgear is working about iPhone not connecting and I had to install an older firmware on my Netgear to solve it.
I have a Samsung Smart TV US55ES7500. I had a Linksys G band router and the TV connected no problem. I just upgradeded to a Netgear N900 dual band router and the TV doesn't even see any network at all. Any ideas? Thanks!