ok so i broke my phone the other night and now when i try to put in the SIM card i have it keeps telling me to insert SIM when i turn on my phone so im guessing its broken. so there was this phone thats been sitting in the lost and found at my job for like 5 months so i was like fck it and took it haha. now when i try to put in MY sim card it keeps saying wrong card? i dont get it?? why is it doing that. this person had t mobile and i have at&t/cingular. it also says "call SOS?" when it says wrong card. is there any way i can fix this and get my card to work in that phone AGHHHH. i knew i shouldnt have took it from the lost and found but its been there forever so oh well. any help???! mayb do i have to go to like a phone store and tell them i changed my service or something? and they can put in my card somehow or somethin.. i really have no ideas? ne1 know?