NOKIA:Out of range trick

This is a very simple trick with lot use in daily life. Most of them are very disturbed due to your mobile phones since calls coming continuously from your girlfriend,home,some friends etc. Since we can't avoid them switching off or disconnecting the mobile since it hurts them. So what should you do?
Answer is that you should use "out of range trick" to avoid them. So just dial *#98702689#(*#warranty#) and you can see that ,your phone is now moved from main menu. If any one calls you, they will hear "out of range" message even if you are under the network tower.So you can do your work without hurting anyone.