Bought a nokia lumia 730 a month a ago ... my phone restarts suddenly sometimes-how to fix?

[Windows Central Question]

earlier it used to restart very often , bt after i had a hard reset its not that often but like thrice in week ... please help ...

 

[ven07]

Perhaps another hard reset would do the trick? Back up your stuff and go for it If that doesn't help and if you have warranty then go ahead and ask for a replacement unit

 

[Diptesh Naik]

ok , i'll try another hard reset . and one more thing does a hard reset void warranty ?