The first iPhone was introduced on January 9, 2007.With internet connection for e-mailing, web browsing, and Wi-Fi connectivity, this smart phone also featured with visual voice-mail, text messaging, a portable media player, mega pixel camera and what else you need from this small and smart device. There are four generations of iPhone apps programming models, and they were accompanied by four major releases of iOS . The original iPhone application development was a GSM phone which established design precedents like screen size and button placement that have persisted through all models. The iPhone 3G added 3G cellular network capabilities and A-GPS location. The iPhone 3GS added a compass, faster processor, and higher resolution camera, including video. The iPhone 4 has two cameras for Face Time video calling and a higher-resolution display. It was released on June 24, 2010. On January 11, 2011, Apple and Verizon together launched a CDMA 2000 compatible iPhone 4 specifically for the Verizon network in the US, released on February 10, 2011.
iPhone application development and Face-time:-
This new 2 way video feature allows iPhone 4 users to make a call to another person and not only talk, but actually see the other party they are communicating with. People have been dreaming about video calling for decades. iPhone 4 makes it a reality. With the tap of a button, you can wave hello to your kids, share a smile from across the globe, or watch your best friend laugh at your stories — iPhone 4 to iPhone 4 or to the new iPod touch over Wi-Fi. No other phone makes staying in touch this much fun.
Brilliant iPhone 4 face-time features:-
-Two cameras made for video calling.
-Share what you see with the back camera.
The new iPhone has brought many cool features to the table for iPhone fans.