Nokia 5220 Xpressmusic
My phone restart often

I am akshay niphadkar from pune, i purchased nokia5220 xpressmusicc phone with 1 gb cardat 28-may-09 for rs 7200

within a week i start facing problem like, mobile restart atomatically, i couldnt personlize ringing tone, when i try to put song one after one it restar,

my mobile has only 120 song no additional software, then why it is restarting,

i feeling cheated right now, its just waste of money

please help me if u can