Summary: I had a similar issue as linda2299 did with my phone. I bought one and forgot it at my house right before leaving for vacation. No one was in my house for the next week, and when I got home and picked up my phone, the screen was cracked. Brand new phone, hardly handled for more than just a ride home from the store, never dropped, not even a scratch - and the screen cracked for no apparent reason.
Summary: This phone would be great except it isn't sturdy enough to do the job it was designed for. We had one for exactly a week and a half before the screen cracked while it was sitting on the counter with no one around. We have no idea how it happened, and the phone definitely was NOT dropped. There's not a single mark on it. The screen is not fixable, and the phone is useless without it.