From my personnal experience, don't update through NSU since I experienced the same problem as the others... It will stop at 1 second left or if you managed to install it, it will flash your phone ( which mean it will delete all the apps you had ). Doing OTA upgrades it and leaves all the applications intact. I live in Montreal, Canada and I am still waiting for the update OTA, although I see it the update in the Application manager but can't update it because it asks me to use NSU... I was wondering even if it's available in the Application Manager, should I just wait for the "exclamation point in the status area" ?