Help automatically shut down

[HITESH JAGWANI]

I uave problem with my samsung galaxy s dous 2 . From 3 days my mobile keeps switching off even though it is enough charged and not even automatically turns on.whenwvwr i take it out of my pocket it is switched off . Is their any other trick available for this excluding to change battery .....thanks for your answers

 

[HITESH JAGWANI]

Yaa and one more thing when my mobile turns off the battery graph goes direstly from 70 to 0 and when i again install it .then it comes back to 70 ?? How could this happen