this is my first post so here goes.... Phone: IPhone 3G IOS: 4.2.1 so today my phone worked fine then tonight the battery was around 79%, i checked one last time then i locked it.. then 30 mins later.. its a black screen,hot, and wont turn on. WHATS THE PROBLEM!!? thts my question, is it fixable?, is it broken? FWI *My power button does NOT work) thx an advance. PS. i used sbsettings to lock my phone.