just got my evo yesterday and went thru this whole big process with sprints tech team to activate it and then it wouldnt even turn on so i had to reactivate my old phone well last night it was working so i activated my evo and the only thing it does now is turn on to the htc evo 4g screen and turn off repeatedly i dont know all the roms and envoked things as i am a computer/tech noob sorry could someone tell me how to fix this in layman terms