Here is the FoneArena LG Optimus 3D (P920) review. The LG Optimus 3D is the world’s first smart phone with Tri-Dual (dual-core, dual-channel, dual-memory) architecture with the full 3D platform for glass free viewing, recording and sharing 3D content. It is powered by Android 2.2 (FroYo) and features 1GHz Dual-core Texas Instruments OMAP4430 processor.
Features of the LG Optimus 3D
- GSM Quad Band , HSDPA 7.2 Mbps
- World’s first phone to comes with Tri Dual Technology
- Dual Core 1Ghz Texas Instruments OMAP4430 processor with PowerVR SGX540 GPU
- 4.3 inch (480×800 pixels) 3D Stereoscopic Capacitive touchscreen display
- Dual 5MP auto focus camera with LED Flash
- VGA video calling camera
- 1920x1080px Video playback , HDMI out and DLNA
- Android 2.2 with the update to 2.3 expected this fall
- 8GB memory, supports up to 32 GB MicroSD cards
- Bluetooth v2.1 , WiFi b/g/n , aGPS
- Browser with Adobe Flash Player 10.3
- Stereo speakers
- FM Radio
- 1500 mAh 3.7 V battery
- Accelerometer , Gyro sensor
Hardware
The phone has great build quality which is sturdy to hold and sleek with just 11.9mm thickness. It has 4.3 inch (480 x 800 pixels) 3D LCD capacitive touchscreen and the screen is smooth and accurate while typing.
The screen is too glossy, so it gets smudged due to your finger prints. You have the video calling camera on the top right and lg branding in the center. The proximity sensor and ambient light sensor is next to the camera and earpiece is above the LG logo.
Below the display are the 4 capacitive touch buttons for common operations such as Menu, Home, Back and Search. The 3.5 mm audio jack is located on the top along with the small power / lock button.
On the left side there is a microUSB port / charging port along with the micro HDMI port.
On the right side there is a volume rocker at the top and the 3D button at the bottom.
The back is smooth with rubbery feel and there are two 5MP cameras with the LED flash in the middle on a metal strip with the words “3D stereoscopic” engraved. The loudspeaker is present below that with another LG logo next to it. 
When you open the cover you can see the 1500 mAh 3.7v battery. The microSD card slot is on the top and the SIM card slot below that. 
Camera
The LG Optimus 3D has Dual 5MP cameras, autofocus and an LED flash. It can capture 2D images at 5MP (2592 x 1944 pixels) resolution and you can manual set the camera to capture other low resolution images below that. 
The Auto focus is default, but it supports other modes such as macro, continuous and face tracking. The touch to focus is also present that is great. It can capture 3D images at 3MP resolution, rather than 2MP resolution in HTC EVO 3D. The Full 1080p HD (1920×1080 pixels) videos can be recorded at a maximum of 30 FPS (Frames per second) in 2D while the 3D videos can be recorded at 720p (1280×720 pixels) at 30 FPS. You can even upload the captured 3D videos on YouTube directly. The 3D video mode has 3D focus mode option that could be set to Border or Center, it also has stabilization option. It also has a front facing VGA camera that could be used for 3G video calling or video chat apps like Skype.
Here are some of the camera samples
Here is a 3D video captured by the Optimus 3D
httpv://www.youtube.com/watch?v=hYbEVnHYAV4&feature=html5_3d
UI
The Home screen and the slide to unlock features are similar to the other LG smartphones like Optimus 2x and Optimus black but the customization options differ. On pinching the screen, it show all the home screen, it support maximum 7 screens and one home screen could be set as default.
To add widgets, shortcuts and folders or change the wallpaper, you need to long press the screen that would list the widgets and shorts and you could simply touch them to add it on the screen. You can also add apps and folders in the similar way that would place them in the grids.You can press and hold the downloaded apps to move it to other position or click the app to uninstall. 
The notification bar has shortcuts to control the Sound, WiFi , Bluetooth , GPS and Accelerometer.The music player is present below and can be turned-off if needed. You can also control the music without unlocking the screen.
Apps
The phone comes with several pre-installed apps such as, Weather, Gtalk, Twitter, Facebook , Richnote, Polaris Office, Google Maps, Finance and E-mail etc.
There is also an app called Smartshare app that lets you share your content with DLNA enable devices such as TVs and Gaming consoles. 
You can always download apps from the Android Market and there is also LG App Advisor app that recommends you apps and games based on your country. You can also register in the LG World store, that also offers apps like Wikitude 3D and games like Archercraft 3D.
3D Videos and Games
To get into the 3D space you can press the 3D button on the right side bottom of the phone or click on the 3D space icon on the screen. The LG Optimus 3D comes with lots of stereoscopic 3D videos, you can also access the videos from the YouTube 3D application in the 3D space or view the captured 3D videos.
There are 3 pre-loaded 3D games such as, Nova, Asphalt 6 and Lets Golf 2. There is also a 3D story book, Gulliver’s travels that reveals the story in an interactive 3D format. You can download more games from the 3D Applications icon that takes you to the Gameloft’s games page. As promised LG has lots of 3D games that are available to download for free (as of now) such as Assassin’s Creed: Altair’s Chronicles, Ultimate Spider Man: Total Mayhem, Real Football 2011, Shrek Kart and Star Battalion, with lots of games would be available coming months. LG has announced that they would launch 2D to 3D game converter this October, to convert OpenGL games, which is great advantage for game developers and the users. The Stereoscopic 3D Videos and the Games are pleasure to watch and play, but it comes with a warning that you might feel dizzy if you watch it continuously.
Multimedia
It has 3.5mm audio jack, and the audio quality is nice with satisfactory audio output. The Music player that could be access from the notification bar and it also include equalizer. In the landscape view the music albums could be viewed in a 3D canvas in an alphabetical order, which opens the album when clicked.
The video player shows all the videos and lists it it as 3D or 2D and you can also watch the 3D videos captured using the camera.
We tested different formats such as mp4, 3gp, DivX, XviD etc. and it played fine. The playback is supported even for Full HD (1920×1080 pixel) video files that plays without any lag. There is also an option to resume the videos from the point of last playback.
Benchmarks
Here are some of the Benchmarks of the TI OMAP4430 processor. Most of these benchmark tools support dual core processors. Quadrant and BenchmarkPi
Linpack in Multi-Thread and Antutu Benchmarks
Phone Calls , Messaging
The phone calls were fine and the features are similar to the other Android 2.2 (FroYo) handsets such as call logs, contacts and groups in addition to the Dialer. You can send messages to particular group, and it also supports MMS and Email. There is a built it Email client apart from the Gmail app.
Connectivity
The phone has connectivity options that include 3G, Bluetooth v2.1, Wi-Fi with DLNA and you can also use the phone as a WiFi hotspot. The HDMI out option is great feature that can be used to connect your phone to normal and even 3D TVs to view the 3D content. The browser is neat and supports Flash content. It also supports Read it Later for the web pages and option to add the page in the RSS feeds.
It supports multiple tabs, and the tab switching has nice 3D view.
It also has Landscape keyboard
Conclusion
Since this is a 3D phone LG has everything right in the Stereoscopic 3D part with the lots of 3D Videos to watch and download and Games to play. There is no dedicated camera key and the 3D key cannot be used as a camera key. The battery life is not spectacular and like most Android phones, it hardly lasts for a single day with a full charge, and with all the 3D videos, games and 2D and 3D image capture it will die before the evening on a single charge. The screen does good in full brightness but has poor sunlight legibility in low brightness, for those would need to reduce the battery consumption this is definitely a downer. The performance is great with the dual core processor and 3D games. It did not lag at all and the 512MB RAM seems enough to run most of the daily applications. They could have provided Android 2.3 out of the box. The update is already being rolled out starting from Europe that would bring lots of new features, hope it makes the phone faster and provides better battery life.
Pros
- First 3D Smartphone
- Great build quality
- Stereoscopic 3D Videos and Games
- Full HD 1080p 2D Video Recording and 720p 3D Video Recording
- DLNA and HDMI out
Cons
- No FM Radio
- No dedicated camera key