I have both a Samsung Galaxy S3 and a new Samsung Tab 3. After a recent software upgrade, I was having connectivity issues to wireless routers. The message I got when connecting to a secure wireless network was "Network disabled because Internet connection is slow". I determined that I had no issues with either my phone or tablet on either an unsecure router (WiFi hotspot), or with any older router that broadcast WPA2 personal with either aes OR tkip security. I do have a problem with connecting to any new router that broadcasts BOTH aes and tkip at the same time. When I change the routers under my control to broadcast only aes or tkip, then I can immediately connect both my phone and tablet to the router. There are obviously a lot of routers over which I have no control, so this needs to be fixed. I am pretty sure that there is a problem with the latest Android software upgrade in this regard