My Galaxy note 10.1 is having problems with wifi. Connecting is not a problem, but at random intervals no communication between my router and the device occurs. At such times it claims it is still connected but only the green upload arrow is on, and none of the programs, like email en the browser, work. Toggling wifi to off and then on again fixes the situation, until it happens again at a seemingly random time later. I don't have problems with any of the other devices (windows laptops, ipad etc) that connect to this router. Anyone an idea what this is and how to fix it?