Why my mobile hanging & restarts?
N5800XM, with 8gb ;free mem on card 5gb
& phone mem free 70mb
The Nokia 5800 XpressMusic is a Symbian-powered smartphone and portable entertainment device by Nokia.
remove the memory card and try it again. sometimes the cards are messing with the phone.
if that won't work, reset the phone (i would first try the reset in the settings menu!)
a firmware update is always a good way to get rid of problems
the firmware can be downloaded here (click)