pbm in sony k790i new.. plz help me frnds

[mck178]

i find that my new k790 i purchased on 26 december 2008 hangs by returning a blank screen after long duration calls exceeding more thn 30 mins. my standby screen becomes blank and i m unable to navigate into the menu screen and also i m unable to switch off the mobile. my memory stick is a 2gb card whis is at present 1524mb free. it is a brand new phone and i m finding it odd.. please help me and suggest me the ways to solve this problem.. let me know why this happens and also the way out.

[philzfog]

try to reflash it buddie se if that solves the problem there are tuts on here showing u how to do it

[mck178]

dude thanks but i tried to update my mobile using somy update solution as found in 1 of the threads.. it replied tht my sw is an updated 1. i gave it a reinstallation.. till the problem is there.. plz tell me wht to do.. looking forwar for ur help pal