Unreachable Network tricks

Friends, we sometimes dont want to receive calls at a particular time. But the caller understands that we are not receiveing call. So make your phone unreachable & the caller will thought that its a network problem. No need of removing sim card! Lets start. Go to Menu> Settings> Phone> Operator selection> Manual. Now your phone will search for available operators. Select any other network except your own network (i.e. If your r using Airtel, select vodafone in). You'll get an error message 'No network access'. Now look at the signal bar. It is empty! But dont press back. If you press back, the phone will capture signal again. If any caller call you then, he will hear that your phone is out of network range! This trick works on almost every nokia s40 handset. Enjoy..