Apple iPhone 4S is the first device to sport Bluetooth v4.0, the most recent iteration of the wireless data transfer technology. This feature has been uncovered by most of iPhone 4S reviewers. With the feature, iPhone 4S will work superbly with other Bluetooth 4.0 compatible devices. As of now, no more devices are there with the advanced Bluetooth technology. Bluetooth 4.0 is backwards compatible to all its previous versions. And so, iPhone 4S works with all other devices.