I don't know if there is anything you can do about it to be honest. Some people's cell phones mess with mine as well. Nobody with Sprint ever interferes with my stuff, but many others do and I'm assuming that it has nothing to do with shielding or anything. Probably has more to do with the phone not complying with part 15 of the FCC rules. But then again, maybe with better shielding it may prevent it, but I have my doubts.