Just ran into this problem the other day when I turned my 8800 off for a flight. I turned the unit completely off and put it back in the OEM holster. After a few minutes it powered on by itself. Thought I may have accidentally turned it back on, so I turned it off again. After a few minutes, it came back on. On the return flight, I turned the wireless off and then turned the unit off and put it back in my holster. It stayed off the entire flight until I turned it back on. The auto on/off is disabled so that's not an issue and the side button isn't configured for any power options. It only happens when I turn it off and put it back in the holster. Any ideas??

Check you Auto On and Auto Off settings. Is there a time interval. I am guessing it's related to the holster settings if you find nothing with the auto on/off.

when i fly, i make sure i turn off wireless first, that way if it does come on, at least wireless won't be.

OK, I had exactly the same issues on a flight on Tuesday, then again today.

All of my settings are correct.

After the flight I turned it off and put it into the holster, front out, front in, upside down, inside out, every direction I could come up with, but it never turned on by myself.

Here's my theory.

The phone, in the holster, was on my belt on the plane. I think that the seatbelt squeezed the phone just enough to re-seat the battery and have it reboot

Who knows, but its the best I could come up with

Did you check WOL?

WOL?

Hmmm, since the other possibility is that my fatness is causing the phone to recycle, does WOL mean Weight Over Limit, or Wide Overhanging Load?

Okay, we are talking long-shot here but worth throwing into the ring:

Was bluetooth enabled on the phone? Now while I haven't had first-hand experience at seeing my phone wake up out of the blue (sorry for the pun), I think I read a post or article on a different forum about odd behaviour of bluetooth devices, especially if it's left in discover mode.

For instance also, you'd be surprised, when on a packed airplane, if you search for bluetooth devices, how many people leave their phone or headset/devices in discover mode.

Also, shutting down the phone by Power Off doesn't do a complete shutdown per se (as partially evidenced by how fast it powers up compared to a reboot of the device).

Again, these are just unsupported theories. My real guess is like the others mentioned already. Perhaps you have a loose or touchy power button and it made contact with something (holster or case flap, body, etc.).

I have had the same thing happen. I just assumed I put the phone back into the holster too soon, so I ended up canceling the power down by "hitting" a key.