I'm thinking he means shut down, as in an alt-f4 gesture followed by an enter keystroke (along with plenty of other irrelevant input) from the radio interference equal an actual shut down. Unfortunately, I don't know how one would prevent a phone that causes this to happen from doing so. I also don't know whether each TS would react the same to each phone/model. Regardless, I would think it might be possible to design a shield around the keyboard, but I don't know how far one could go with it, nor how effective it would be. Yet another reason to remember I'm glad I don't have a cell phone.