Nokia E5 using good operating system Symbian Series 60 which already
known have good stability to do hard work.
But some time we will get problem with Nokia E5, maybe because
of applications or other reason. Of course hang
problem or not responding will make Nokia E5 hand to use.
We suggest to do soft reset or reboot Nokia E5.
If Nokia E5 still get the same problem, better to try flash or
hard reset Nokia E5.