I've noticed when the phone goes into standby mode (press the right power button), the 3g eventually turns off. Is there a way to prevent that from happening? I'm assuming I can't get any notifications (i.e. Instant Messenger clients, Google Voice, etc.) while the 3g is off, but not sure. I'm also assuming 3g goes into sleep mode, as when I power the phone up I don't see the 3g icon (is that assumption correct?).