Apple quietly rolled its iOS 4; formerly named iPhone OS 4 on Monday. The upgrade introduces several key features such as multitasking, a unified inbox for e-mail and the ability to group apps into folders.
The development teams at Apple have delivered, among other things, limited multitasking for third-party applications, better application sorting and management, and improved e-mail functions which makes using the iPhone a much more polished experience without sacrificing battery life.
The fourth iteration of the iPhone’s OS is supported by the iPhone 4, last year’s iPhone 3GS and to a lesser extent, the iPhone 3G that arrived in 2008. Recent iPod touch models are also supported. However, original iPhone from 2007 and the first iPod touch does not support the iOS 4.
The multitasking services include:
- background audio, which means users can play music from Pandora in the background while using other apps;

- background voice-over-IP for so Skype users to remain on their call even if they switch to other apps;
- background location, which allows apps that use GPS to track where you are;
- push notifications, which were first introduced in last year’s iPhone 3 OS;
- local notifications, a service that can track and alert application events without relying on Apple’s push notification servers;
- task finishing, so uploading photos to Flickr isn’t interrupted just because you switch to another app; and
- Fast app switching, quickly saves app’s current state when you switch away to something else — and brings it right back to where you left off when the app is relaunched.
To aid in switching to other apps quickly, a double-tap of the Home button calls up an app switcher, featuring the four most recently used apps.
A swipe on the touchscreen to the right right reveals audio controls and a screen rotation lock; a swipe to the left reveals more recently-used applications. Tapping and holding allows you to manually kill running apps, if you’re so inclined.
With iOS 4, applications can be organized in folders, each of which can hold 12 apps an dup to 2160 apps if you utilize all of the folder space.
One addition that would make this even better: an option to password protect folders; certain data on the device couldn’t be readily accessed by anyone.
Exchange 2010 now works with iOS 4, and the iPhone now can sync calendar, contacts and e-mail with more than one Exchange account.
Security has improved as well, as the iPhone now uses the device’s passcode as an encryption key. Also of note, iOS 4
allows enterprises to securely host and distribute in-house apps over the air without forcing users to connect with iTunes on their host computers. Another notable feature for enterprise users: support for SSL VPN security.
Mail now supports e-mail threads, storing e-mails with similar subject lines in a unified list, allowing for better conversation tracking. The Mail app now supports a Unified Inbox, allowing you to keep track of all of your e-mail inboxes in a central location.
Recent Comments