Originally Posted by
Hashan Niranga for the first Critical update took like hour to complete not for downloading and preparing only to restart and update :( any idea about second critical update time o lumia 625
My suggestion is for you to wait for it to complete. It should be around 1AM in Sri Lanka now, so I think you can leave it over night to finish the update. I can't give you an estimate duration, but I'm guessing it should be slightly longer than the first critical update, since this update seemed to make the phone perform a lot smoothly than before (more under the hood fixes, I suppose).