People don't call each other anymore, they only text, one old friend of mine trying to call me to chat, we haven't been talk for awhile, my phone is off, never know he called, since the call is not important, he will never call again because he think...
i have to leave the phone on 24/7, once the phone is off, there is no way to know who had been calling you unless they leave a voice mail. Like Wind, the Missed call service is perfect for this issue. Why PM do not have this service?