iPhone 4 (CDMA)

On January 11, 2011, Verizon announced that it had reached an agreement with Apple and would soon be offering the iPhone 4 to its customers. Prior to this, the iPhone had been an AT&T Wireless exclusive in the United States.

iPhone 4 (GSM)

With the iPhone 4, Apple introduced its Retina Display. The screen was the same size as on previous iPhones, but with twice the vertical and horizontal resolution. It was a revelation.

iPhone 3GS

The iPhone 3G had been a step forward in some areas – especially in adding 3G data support – but in other areas it was no better than the original iPhone. With the iPhone 3GS, Apple took a few more steps forward with a faster processor, a better camera, video capability, and a 32 GB option.

iPhone 3G

One of the biggest complaints about the original iPhone was that it didn’t use 3G for wireless data, instead depending on the far slower – average data speeds between 75-135 Kbps – EDGE protocol. Another complaint was the lack of third-party apps. The iPhone 3G addressed both of these.