Updating iphone from 2 1 to 2 2
Originally, i Pod Touch users had to pay for system software updates.This was due to accounting rules making the device not a "subscription device" like i Phone or Apple TV, and significant enhancements to the device required payments.When a passcode is set and a user switches on the device, the passcode must be entered at the Lock Screen before access to the Home screen is granted.In i Phone OS 3, Spotlight was introduced, allowing users to search media, apps, emails, contacts, messages, reminders, calendar events, and similar content.The screen has a status bar across the top to display data, such as time, battery level, and signal strength.The rest of the screen is devoted to the current application.
The decision enabled the success of the i Phone as a platform for third-party developers: using a well-known desktop operating system as its basis allowed the many third-party Mac developers to write software for the i Phone with minimal retraining.
Originally unveiled in 2007 for the i Phone, i OS has been extended to support other Apple devices such as the i Pod Touch (September 2007) and the i Pad (January 2010).
As of January 2017, Apple's App Store contains more than 2.2 million i OS applications, 1 million of which are native for i Pads.
Internal accelerometers are used by some applications to respond to shaking the device (one common result is the undo command) or rotating it in three dimensions (one common result is switching between portrait and landscape mode).
Apple has been significantly praised for incorporating thorough accessibility functions into i OS, enabling users with vision and hearing disabilities to properly use its products. The current version, i OS 11, was released on September 19, 2017.
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With i OS 7, Apple announced that they would change the system font to Helvetica Neue Light, a decision that sparked criticism for inappropriate usage of a light, thin typeface for low-resolution mobile screens. i OS 4 introduced folders, which can be created by dragging an application on top of another, and from then on, more items can be added to the folder using the same procedure.