I posted a similar thread awhile ago and really didn't get a working response. The issue is that I have a Samsung Galaxy S3 (i747) and whenever I send or receive an MMS message on my phone when connected to WiFi, it not only knocks my phone off of the WiFi, but disables the WiFi on all of the other devices in the house. We can still see the WiFi signal, but can't connect to it. We have a Surfboard SBG6580 combination cable modem/wireless router. As soon as a picture is added to a text message, my phone buzzes, it displays a message that the file is too big and it is condensing it and then the WiFi gets knocked out. AT&T says they can't figure it out. The cable company has been here several times and have replaced our SBG6580 three times with new modems and have run new cable. This does not happen to anyone else in our house that has iPhones or an HTC Mini. Just mine. And it has to be the Galaxy that is the issue because our niece has one and as soon as she comes to our house, her phone knocks the WiFi out too. I am beyond frustrated and am asking for help. Please!