I got an iphone 5 so I gave my 4s to my mother. This morning a notification came up on my phone saying "[mom's name's] iphone" is now receiving imessages at [my email address]. I obviously do NOT want my mother seeing every imessage I get since I'm 24 years old. She looked in her imessage setting and doesn't see my email address anywhere, but I am still nervous. Is there ANY way I can go to some website and disable ALL imessage devices sort of like you can deactivate all itunes devices? Thanks for the help!