I just recently purchased an iphone 5c from a friend of mine. According to them it was in working order when they last used it 3 weeks ago. Since I've had it, it won't turn on for me. It shows the plug & the itunes logo screen. I have taken it to an apple store and they tried resetting it, but it didn't work after 3 tries. There is no water damage according to apple & it is 2 weeks outside its original warranty. So now I have an iphone that doesn't work. I'm thinking maybe it was jailbroke, any suggestions, or ideas on what I should do? Thank you in advance.