My icon just did the same thing. Went to bed with a working phone. Set it on the wireless charger and woke up to none of the physical buttons working. If you get a call or a text, the screen will come on and you can use your phone, but cant adjust volume or put it back to sleep. Its a physical issue as hard reset didn't fix it. Annoying as this phone is only a few months old. Hope I don't need to call anyone soon..... Between this and my Nokia 2520 tablet taking a dump, im beginning to loose faith in Nokia. They used to be top notch hardware....