What's new in Android 4.4, KitKat?

Once you've upgraded your phone, you’ll see the following improvements to the Android operating system and other apps on your phone:

• Printing. Print photos, docs, and web pages to Google Cloud Print, HP ePrint printers, or other printers that have apps in Play Store.
• Improved lock screen. Control music and videos from lock screen. Access the camera by swiping left from the right edge of the lock screen.
• NFC Host Card Emulation. Enhanced support for NFC Host Card Emulation (HCE), to improve experiences such as contactless payments, loyalty plans, transit passes, card access and more.
• Emoji. Now you can insert emoji, the colorful Japanese characters, using the Google Keyboard.

Other improvements include:

• New version of Google Hangouts that supports integrated SMS/MMS messaging. To set Hangouts as the default SMS app go to Settings > More (under WIRELESS & NETWORKS) > Default SMS app.
• It's easier to insert pictures and videos in emails and text messages.
• Ability to display captions in videos that support captions. Go to Settings > Accessibility > Captions.
• You can now control what location information your phone shares with location-based services right from the quick settings.
• Support for Square Register credit card reader.