Pebble connects by Bluetooth to your iPhone or Android device. Setting up Pebble is as easy as downloading the Pebble app onto your phone. All software updates are wirelessly transmitted to your Pebble. COMPATIBILITY iPhone 3GS, 4, 4S, 5 or any iPod Touch with iOS 5 or iOS 6. Android devices running OS 2.3 and up. Works great with Android 4.0 (Ice Cream Sandwich)! Unfortunately Pebble does not work with Blackberry, Windows Phone 7, or Palm phones at this time.