[android-developers] Restrict opening Settings application

Hi,
I Am working in a organization.We developed a project in which more
than 50 users will use Android mobiles with O.S 2.2(Froyo).My users
are having less knowledge on Android.So i want to restrict them not to
open Settings application because they accidentally or intensionally
change seetings that may cause loss of data or stop my app.
I need following Settings shuold not be changed

1)Time,Time zone always automatic(Network provider)
2)User should not clear my app data

Please tell me if u have any ideas.

Thanks and Regards
P.Ramkumar.

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