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Hmm, now you metion it. 
Go to camera > press menu button > self timer > set any time ( x seconds)
Now after settings, you may want to capture a phone. press/ tap on the capture key and you're done.
The phone would take a photo after x seconds
Doubts ?
Please ask 
Means you aren't able to find it ?
Go to menu > alarm and clock > timer / stopwatch
In time you can set time for how long you want it to be. Once you set it , tap on start and that's it
I hope that's what you were looking for
i'm asking about the self timer camera..
sorry.. first time i forgot to mension about camera