Every time I have powered down my phone I have been unable to restart it without putting it in the freezer for a few minutes. This bizarre little workaround has worked, without fail, including recently at an airport in Minnesota where I had to make due with a snowbank. While the workaround is nice, I sure would like to know what's up and if this is something that can be fixed. After all, I might like to travel to warm climates one day.