1. Connect your device to your laptop using data cable
2. Go to folder: Computer\SAMSUNG-SGH-I747\Phone\Applidium Image Cache
3. Delete everything in this folder
4. Go to folder: Computer\SAMSUNG-SGH-I747\Phone\Android\data\com.sec.android.gallery3d\cache
5. Delete everything in this folder
6. Restart your phone
7. Camera works