hi all i just received an iPhone 4 from a friend recently it shut off and it shows the apple logo only when plugged in the computer i have surfed the net to see what the problem is when i restored it with iTunes it shows error 1602 so i tried the stuff they said to try to fix it but nothing worked even the jailbreaks any suggestions sorry all still a newbie with all this and its an iPhone 4 gms thanx everybody