I have a Palm Treo 600 (Sprint) and the screen turns on by itself every 5 minutes (whether or not the wireless mode is on/off). I thought it was a malfunction, so I exchanged it & the new one also does this. I have the latest software (Treo600-1.20-SPR) and have reset it. I haven't found this as a documented feature in the User Guide. Although I have the screen automatically turn itself off after 30 seconds, this will waste the battery (since the screen will be for 6 minutes every hour even when I'm sleeping). Any way to disable this feature? Thanks a million for your help.