When switching from iPhone 4S to New iPhone 6 Plus, you must want to transfer all data from iPhone 4S to iPhone 6 Plus. Here is a video guide about copying contacts, messages, video, photos and music from iPhone 4S to iPhone 6 Plus, no need with iTunes.
Watch the guide:
Phone to Phone Transfer for Android, Symbian & iOS
> Transfer various data like contacts, messages, photos, music, videos and apps
> Support Phones from Apple, HTC, Motorola, Nokia, Samsung, Sony, and More
> Work with new Motorola Nexus 6, Samsung Galaxy Note 4, iPhone 6 Plus, etc