Im interested in getting this phone, it looks great. My only question is does it have a keypad lock? I mean a real one? I have a slider phone right now and it is "locked" when you slide it down but it "unlocks" as soon as you slide it up--come on! Im wondering if this one does the same thing..or if it actually has a lock that you have to key in a code to unlock. Looking for something that my little ones cant get into if they get ahold of it. Thanks!