I don't know my cell phone number. If someone asks and I'm carrying my GSM, I send them a missed call so they get it. But quite often I forget it at home, and t

I don't know my cell phone number. If someone asks and I'm carrying my GSM, I send them a missed call so they get it. But quite often I forget it at home, and that's embarassing; they think I'm making excuses to avoid giving them my number.