in short, when i press the home key/close an app the password lock screen appears and it's annoying. Also the volume level doesn't affect my text message notification. long story:A week ago sprint told me to factory reset my phone to get rid of the error 67 problem, ever since then i've had this problem. So they told me to factory reset it again and the problem continued. then they sent a replacement and now i'm still getting the problem before i installed any apps. the SD card is the same though. So i'm confused and don't want to delete everything from the sd card. ....help?