The camera can also be used to lock and unlock the tablet thanks to face recognition, enhancing the security of the device and making it truly yours.

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The Delphi connectivity system's key fob service operates over the Verizon Wireless network or via Bluetooth to remotely lock or unlock doors, open the trunk, start or stop the engine and operate a panic horn on select vehicles.

ENGADGET: Delphi and Verizon launch new connectivity system: track and monitor your vehicle through your smartphone

The Smart Knob promises a smarter, more secure deadbolt lock that lets us issue time-limited unlock codes or give trusted visitors a way in.

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Because not only did he lock and encrypt his entire hard drive, but once you'd unlock that, there was another layer of security inside.

NPR: The Math Behind Pellicano's Code

Case in point: I was able to unlock the phone by holding a photo of my face up to its lock screen.

WSJ: Galaxy Nexus: An In-Your-Face Android Phone

For those using Android 4.2 Jelly Bean, Google has also built a Keep widget, which can be placed on your Android homescreen, or on your phone or tablet's lock screen, which would enable users to add a reminder without even having to unlock their device.

CNN: Meet Keep, Google's answer to Evernote

Seven different lock screens are also on the menu, which range from secure options such as Face Unlock, PIN and password to a rotary style screen that offers up to six apps for quick launch access.

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Generally, these manufacturer skins exist with the claimed goal of enhancing the platform's stock functionality, but we actually found a case on the Epic where the opposite is true: the phone's lock screen consists of a circle in the center of the screen that you drag up to unlock... and that's it.

ENGADGET: Epic 4G review

Known as Nexus Root Toolkit, the program can be used to easily unlock and root Nexus devices, and can also return them to stock and re-lock the bootloader.

ENGADGET: Refresh Roundup: week of July 9th, 2012 Mobile