Samsung Galaxy Y Duos shuts down and restarts on booting

me recently purchased Samsung galaxy y duos smartphone. But still I am not able to use it. Whenever I try to switch on the mobile it automatically shut down and restart. And this procedure goes on. Please tell me where the problem is.

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Regarding this issue..

This type of issue will happen when you lost internal settings in your device..

And then hangs your apps and device totally not responding to you..

So if its possible means just reset your device for that process is

Settings>>Privacy>>Factory reset settings if you did the process means surely you can get back what you lost in your device...

But no need to repeat this process again and again...

still your device not responds to you means have to visit service center and fix the bug for it...

Hope you got it...Thank you...

*It may be due to low charge so firstly charge your device and then turn it ON.
*If still not work then there may be some software problem in your device go to customer care and upgrade your device.
*Also scan your device with good antivirus.
*Don't store unwanted application in your device it may cause hang problem.