Support S2 lost contacts, home screen layout, etc, but kept other data?

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http://androidforums.com – **Sorry, i posted this in the wrong forum, probably belongs better in here** Hope someone can help with this. Switched off my phone tonight, everything was fine, went out in the car and popped it on charge. When i switched back on a half hour later, the following had happened: - Wallpaper behind lock screen reset, but password still ok - Home screen layout gone back to factory reset, but background wallpaper still there??? - All apps, music, etc, remain - Contacts all gone, but groups that i set up remain?? Seems it has been a bit selective about what has been removed, has anyone (General)