n70 hangs

i have nokia n70. the phone hangs very often.
It happens when i store a number and give a ring to that number or when I just key-in a number and call it.

try first to put out your mmc if that not help then try to flash the phone with *#7370# then type 12345 for the code..if not any of this work then you have to take it to a nokia care center

thanks. i ll try it.

Try to remove useless applications it will slow down your phone's system.