The Apple device that revolutionized mobile computing and caused an explosion of smartphones worldwide. Data and applications can be sent to the phone wireless or via Apple's iTunes software, which is used to organize music, videos, photos and applications (see iTunes). The current models are the iPhone 6s, 6s Plus and SE. See iPhone versions, iPhone vs. Android, iPhone 6s and iPhone SE. Quite a Frenzy No cellphone ever created so much buzz. People camped out overnight to be first in line when it debuted in 2007. Considering more than 200 million Apple devices were sold in the following four years, the enthusiasm was justified. Since the App Store was launched in 2008, hundreds of thousands of apps have been written for it. With the built-in GPS adding an extra dimension, Apple pioneered the most versatile computing tool ever. See smartphone. Apple started the craze, and Android followed, eventually outselling iPhone by a huge margin worldwide. In addition, Windows Phone and BlackBerry 10 each added innovations to the smartphone paradigm. See mobile compatibility and mobile device vendor control. Specifications and Data Service Powered by an ARM processor, the iPhone is a GSM or CDMA phone that uses a custom version of the Mac OS X operating system and flash storage up to 128GB. Unlike other smartphones, iPhones use sealed batteries and must be sent to Apple or a third-party for replacement. See smartphone features, carrier data plans, iPod, iPod touch, iPad, iBricking and iClone.