Lumia 820 turns off by itself

Question

Hi everybody,
I've had my Lumia 820 for about 2 weeks. At the begining everything was fine, but recently I've had several problems with the device as I mentioned in the title. It turns itself off time to time. It doesn't matter if I'm using it or it's being charged. I called Nokia Customer Service about this issue, and they said I had to give the phone to the service to be repaired.But I heard that the new one also shuts down. I sent some feedback to Microsoft too, but no reply so far. I just want to know if it is about the software or hardware. Does anybody have an idea about this issue?
If the problem is about the hardware I'm sure I'm not gonna buy another Nokia phone in my life. If it's about the software, I hope Microsoft will release an update ASAP.
In my opinion, both Nokia and Microsoft had better find a solution about this issue immediately just before they lose their new enthusiastic customers. Soon it could be so late...
I just can wait for a couple of weeks, then I'm done with both....
By the way, I heard that Lumia 920 and HTC X both have the same problem. So I think it's about the Windows 8 OS.

Answer 1

mgspan wrote:
I have the same issue with my (old) Nokia 3120c.   Customer service has tried to solve it a few times, with no success.  Just runarounds, like (1) it couldn't be, (2) try updating SW version (didn't help), (3) clean battery (didn't help).
What I have discovered is that (1) it is very dependent on location.  Never happens at my rural home, but often happens in big cities.  (2) If I put it in a Faraday cage (like a metal box) it never happens.  (3) It happens even if nobody touches or moves the phone.
At work it happens often.  I find that if I put it on a large metal plate, it stays on, but cannot receive calls.  But if I  
put it about 1 cm above the metal plate, it stays on and is still able to receive calls.
Possible conclusion, at least for the Nokia 3120c, but probably for other Nokia phones too, at least in some cases:  it is seeing some sort of RF overload and shutting itself down because of this. 
One other point...a different phone of the exact same model which I tested shows the same thing, but much less often.  That is, it is much less sensitive to the suspected overload.
Is it a software issue?  Hard to say.  It could be that the software sees the RF level too high and shuts down the phone as a protective measure.  OR, it could be that some hardware mechanism is operating that shuts down the phone without any software intervention.
I see that there are hundreds of posts with various phone models which complain about this issue, but I have not seen any reply by a Nokia employee.  Frustrating to say the least.
Your experience is very interesting. But I don't think my problem is the same. By the way despite all my feedbacks, no one from Nokia or Microsoft reply me... The most interesting thing is that, I think. I'm considering to change my phone if the problem goes on...