The iPhone 4 and its predecessors are more than just fancy cell
phones. With their range of features – from phone to web browser, from
iPod to mobile game device – the iPhone is more like a computer that
fits in your pocket and your hand than any cell phone.
While the overall presentation of the iPhone 4 is similar to its predecessors, it's different in that it's no longer tapered on the edges, includes a glass face on the front and back, wraps the antenna around the outside of the phone (which has caused antenna some problems), and is slightly thinner.
All iPhones offer a 3.5-inch touchscreen that employs multi-touch technology. Multi-touch allows users to control items on the screen with more than one finger simultaneously (thus the name). It’s multi-touch that enables some of the iPhone’s most famous features, such as tapping the screen twice to zoom in or “pinching” and dragging your fingers to zoom out.
Other major differences between the iPhone 4 and earlier models include use of the Apple A4 processor, the inclusion of two cameras, a high-resolution screen, and improved battery life.
Both phones use a trio of sensors to produce some of their best usability features, though neither model offers expandable or upgradeable memory.
iPhone Specfications
Physically, the iPhone 4 differs a decent amount from the iPhone 3GS and previous models, all of which were broadly similar in shape.While the overall presentation of the iPhone 4 is similar to its predecessors, it's different in that it's no longer tapered on the edges, includes a glass face on the front and back, wraps the antenna around the outside of the phone (which has caused antenna some problems), and is slightly thinner.
All iPhones offer a 3.5-inch touchscreen that employs multi-touch technology. Multi-touch allows users to control items on the screen with more than one finger simultaneously (thus the name). It’s multi-touch that enables some of the iPhone’s most famous features, such as tapping the screen twice to zoom in or “pinching” and dragging your fingers to zoom out.
Other major differences between the iPhone 4 and earlier models include use of the Apple A4 processor, the inclusion of two cameras, a high-resolution screen, and improved battery life.
Both phones use a trio of sensors to produce some of their best usability features, though neither model offers expandable or upgradeable memory.
