Android OS Overview Android 4.1 (Jelly Bean)

Android 4.1 corresponded to the "Jelly Bean" milestone branch, Android 4.1 is the fastest and smoothest version of Android yet. We’ve made improvements throughout the platform and added great new features for users and developers

Faster, Smoother, More Responsive

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Android 4.1 is optimized to deliver Android's best performance and lowest touch latency, in an effortless, intuitive UI.
To ensure a consistent framerate, Android 4.1 extends vsync timing across all drawing and animation done by the Android framework. Everything runs in lockstep against a 16 millisecond vsync heartbeat — application rendering, touch events, screen composition, and display refresh — so frames don’t get ahead or behind.

LG Optimus 2X

Announced: 16 Dec 2010 - Release date: 24 Jan 2011

For

• Dual-core power
• 4in LCD screen
• Excellent price
• Slick HDMI mirroring
• Brilliant music player

Against

• Flash impedes browser performance
• Disappointing camera/video recording
• Quiet speakers

LG Optimus Me P350

 Announced 2011, January _ Released 2011, February
 
For

• low price
  

Against

• Low pixel densitiy screen, below 180ppi (143 ppi)
• Low resolution display (240 x 320 pixels)
• Low-resolution camera (3 megapixels)
• The camera lacks autofocus
• Lacks an ambient light sensor for automatic screen brightness adjustment

LG Optimus One P500

 Announced: 14 Sep 2010
For

• Solidly built
• Uncluttered Android 2.2 OS
• Great battery life

Against

• Slow processor (600 MHz)
• Low-resolution camera (3 megapixels) 
• No Flash Player 10.1 support
• Bland design

LG Optimus GT540

Announced: 07 Jan 2010 - Release date: 11 Jun 2010

For

• Camera belies the price tag
• Stylish chassis
• Good battery life

Against

• Resistive touchscreen technology means its display is less sensitive than you would like it to be
• Low-resolution camera (3 megapixels)
• Screen is small
• Lacks an ambient light sensor for automatic scr

LG GW620

Announced: 14 Sep 2009

For

• Nice QWERTY Keyboard

Against

• Resistive touchscreen technology means its display is less sensitive than you would like it to be
  Low-resolution video capture 
• Lacks an ambient light sensor for automatic screen brightness adjustment

Motorola MILESTONE

Announced: 2009, November

For

• Great browser
• Pinch and zoom multi-touch
• slick screen
• High pixel densitiy screen, over 265ppi
• Judder free UI
• QWERTY keyboard
• Slim frame

Against

• Poor camera

Motorola BACKFLIP

Announced:  2010, January

For

• Cool touchpad navigator panel behind the screen
• Nice Keyboard
• Fairly good camera

Against

• Slow processor
• Short Battery Life
• Very poor call quality
• Poor wireless data connections
• Too little RAM memory (256 MB RAM)
• Low-resolution video capture
• Lacks an ambient light sensor for automatic screen brightness adjustment