Crash

[galph]

my touch pro is running very slow and it also cracked at the chrome part. i tried to get a new one buy going to sprint and telling them that my fun is running way slow and that the crack on the chrome is a known issue, but they said they dont deal with cosmetic issues and as long as the phone is working they cant change it out. so i was wondering if there is a program or way to crash my phone where it wont work as well so they cant see it doesnt and they can order me a new one. thanks for the help in advance!