device lock is not a solution in my case. As i said before, its almost regular that people want to see what are the functionalities of n900 so i give them the device and they use it for few minutes. Some ppl are good and you know that if they say they are not going to read your conversation they wont (you dont even to mention this to them), but there are people in your friend's circle who you know if they get a chance to read your conversations they definitely will (and its seems so rude to not let them view the device). Its not a big problem for me right now, because I regularly delete certain gtalk conversations. Specially before friends get togethers I have to clear just few of my conversations, cuz i know almost all of them will be checking out my 900. As i said, n900 is a very personal device, and its hard to tell ppl that it is