Hello Rainer, > I had my tablett accidentially switching on in my pocket several times. > This > caused that the battery got empty. Is there anything I can do to "protect" > the phone to switch on by accident? Shouldn't it be sufficient if you put on the protective cover? The keys should be locked then. I don't have my 770 around here at work, so I can't confirm that this works even if the device is off... HTH, Thomas Dankert