contacts icon on call screen during call on the galaxy grand

I own a samsung galaxy grand gt-i9082 ..The question is during a call the icons appears on the screen is

1.add call

2.mute

3.speaker

4.End call

5.keypad

I want contacts icon during a call to spell their contact number to the other person ,but i can't get the contacts any way during a call..please help me to get the contact list during a call in progress ....