I have experienced crash before on my Surround. It was due to corrupted mp3 files or the flash memory is dying on that section. The whole system just stuck, I connot turn it off. I literally had to take out my battery. I am going to 920, but, without the ability to remove battery, I can't fix situations like this. Anyone know if windowsph8 has any kind of special design as robust as removing the battery? Thanks.