Ok i have a family plan with my mom and I. I have the unlimited texting plan and i just upgraded November of 2008. I upgraded from my motorola slvr to a palm centro is which i have now. I want to get an iphone but i don't want my mom to know. Is there anyway i can just buy the phone and put my sim card in it and activate without anything changing in the plan so my mom won't ask any question? My provider is At&t obviously again i said I have an unlimited texting plan for my palm centro. Oh but we didn't send in the rebate yet but my mom said its too late to send the rebate. Please help need answers fast.