my iphone 4s died and wont turn on. ive googled evrrything and ive tried everything. i did the holding down bith buttons like a hundred times. im gonna go to at&t probly tomorrow. are they gonna fix it for free? and if they do, will all my pictures and videos and old stuff be gone? i hvent backed it all up yet. also, this happened like 2 days ago so my phone has been dead for a long time. and it's not the charger. and when I do plug it in, my phone stays really cold. pleasssseeeee help