The S4 CD comes with a SmartSwitch program to assist migration from other phones.
The following devices are supported:
Apple: iOS versions 4.2.1 or higher.
Blackberry®: Blackberry OS version 6.0 or higher.
LG: Android version 2.3, Gingerbread.
Nokia: Series 40 or higher; Symbian 6.0 or higher.
Samsung: Data backed up using Kies version 2.5.2 or higher.
What is the Smart Switch application, and How do I use to transfer content from my iPhone? my samsung
Docs are pretty good.