I got the iPhone 3GS and it's been clearing my text messages sometimes even before I get a chance to read it. There's times when I have the sms app open or try to send a message it will go straight to my home screen and when I reopen it ALL my messages are gone. I exchanged it and the new one is doing it too. I've restored it 5 times today...I've tried it without my apps...I tried deleting itunes and re-downloading it...none of it has worked. Has anyone else had this problem or know how to fix it? 
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