The 3.5-inch (8.9cm) display (320×480 px at 160 ppi) touchscreen is specifically created for use with a finger, or multiple fingers for multi-touch sensing. No stylus is needed, nor can one be used, as the touch screen requires bare skin to operate.
For text input, the device implements a virtual keyboard on the touchscreen. It has automatic spell checking, predictive word capabilities, and a dynamic dictionary that learns new words as you type. Notably, the predictive word capabilities have been deftly integrated with the dynamic virtual keyboard so that users will not have to be extremely accurate when typing — i.e. touching the edges of the desired letter or nearby letters on the keyboard will be predictively corrected when possible. Additionally, an optional landscape mode for text entry with the virtual keyboard has been mentioned by Apple executives as a possibility for iPhone, but The iPhone features an amazing 3.5-inch widescreen display, and has one of the most revolutionary user interfaces since the mouse. The interface is unlike anything you’ve ever experienced on a phone, with a large multi-touch display and innovate new software that allows you to control everything with the touch of a finger. Apple has not yet come to a final decision as to its inclusion in the shipping version of iPhone. A possible advantage of landscape text entry would be the availability of larger keys to ease text entry, especially for individuals with larger fingers.

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