The Hidden Secrets of Apple’s iPhone OS 4

“Though iPhone OS 4’s real potency will come when developers seize the new tools and build multitasking apps that do crazy, crazy things, many of the OS’s inherent secrets are coming to light,” Rosa Golijan and Wilson Rothman report for Gizmodo.

“You might have spotted some of these [features] in our thorough hands-on videos, but most of nuggets below are new discoveries,” Golijan and Rothman report.

• Cellular Data On/Off
• SMS Character Count
• SMS Search
• Home Screen Backgrounds
• Camera Zoom
• Web and Wikipedia Search
• Borderless Document View
• Streamlined “New Contact” Screen
• Events, Faces and Places in the Photo Menu
• Lyrics/Podcast Data Toggle
• Spellcheck!
• Resize Photos While Sending
• New Playlists
• Art in Album View
• App-Specific Location Services
• Game Center
• Email Threading
• Long Alpha-Numeric Passcodes
• Unified Inbox
• App Folders (with Alerts)

You can view all your emails in one spot or segregate them to separate inboxes.

Full gallery here.