I am getting almost 10 spontaneous reboots per day on my Inspire. It happens when the screen is off and just sitting on top of a desk or in my pocket. The phone is not rooted. I've done battery pulls and deleted a task killer app. Does not help.
Have you tried a hard reset? My wife's Inspire is doing the same thing, but she also gets a "SIM card not recognized" error, so I think her SIM card may be bad.
I would try the hard reset first. If that doesn't resolve it, and if you still have one, pop in a 3G SIM card to see if it still reboots. If not, then you've got a bad SIM card.
I am getting almost 10 spontaneous reboots per day on my Inspire. It happens when the screen is off and just sitting on top of a desk or in my pocket. The phone is not rooted. I've done battery pulls and deleted a task killer app. Does not help.