A company top executive request a mobile phone change from Samsung to an IPhone, How do you move his contacts from the Samsung mobile to the IPhone?

You can send all the contact via e-mail to another email , open that E-mail on the iphone and check the attached file and they will sync to the iphone ~~ Regards

All you have to do is sync the contacts from samsung to gmail. Then on iphone set up the primary account as that gmail or in "mail" configure that gmail account and sync contacts. Piece of cake. Hope this helps.