The phone in question is a 3gs. For the past 5 days whenever I leave the iphone for long periods like overnight the home screen get reset. Here is what it looks like when i slide to unlock: The % on the the battery is gone, the lock wallpaper is now my home screen wallpaper, ring and sms tone changed to a built in one and all my folders execpt utilities are gone with 11 pages of icons. Now I have the task to put all the icons back into folders which take about 30mins to sort. What do you think can cause this?