so my phone (nokia 5310 xpress music) recently broke. it turns on, gets passed the t-mobile welcome screen, reaches the date&time changer and then it starts freezing and then automatically turns off. my phone is still under warranty, but i'm scared because i switched the phone's faceplate/housing before, does this void the warranty or can they still fix it ? by the way, other people have faced this problem and they said the first batch of nokia 5310's will encounter this difficulty. thanks for any contributions.