[Mike RB]

I've had my 620 for a couple weeks now and in that time its locked up four times meaning I had to soft reset it.

Three times, it wont respond when its on but with the screen off ie. When I go to use it after it being left alone for a while.

Anything I should be looking to do in order to get to the bottom of this?

[Mahdi Ghiasi]

My Lumia 620 had same problem two or three times.
Dropping battery and putting it again solved this problem each time.

I think this is a software issue. Maybe OS hangs when the display is turned off.

[Coolknight1968]

The same issue on the 920 is common... I have the issue on my Lumia 920.

[Mike RB]

Thanks for that guys. I was pretty certain it was a software problem, either something I've installed or the OS.

I still love using this phone though. Great upgrade from my old Symbian phone.

[claps]

I sometimes notice the same issue, but only when airplane mode is on. Quite annoying as I am often overseas.

[dandiar]

had this issue. apparently the problem was too many background apps and a battery live tile that wasn't responding. so i uninstalled the app and disabled most of my background apps.