Samsung Galaxy S III will go on sale in Europe on May 29 and in the US this summer. The Korean company that showed off the phone on Thursday at an event in London said the phone will go on sale in 145 countries with 296 phone companies. This would make it the company's biggest launch so far.

Features :

1. The latest offering by Samsung Electronics Co's Galaxy S III  will have a high-definition touch screen that's nearly twice the size of the iPhone, while being thinner and lighter than Apple's phone.

2. S III will run Google Inc.'s Android software. The processor, or "brains" of the device, will be upgraded to include four computing cores. The iPhone and most other high-end phones are "dual-core," but there are some quad-core devices on sale already.

3. S III's expanded voice-command features. When the phone screen is off, owners will be able to "wake" it up by saying "Hi, Galaxy." They can then give further spoken commands

4. The screen size has increased with each version: The Galaxy S had a screen that measured 4 inches diagonally. It was followed by the S II, at 4.3 inches. The S III screen has a 4.8-inch screen.

5.  Samsung will sell a pad that charges a phone placed on it, with no need to connect a cable.

6. In US, Japan and Korea, the phone will use fourth-generation, or 4G, networks for faster data downloads. Samsung didn't say which carriers would sell it, but the previous Galaxy model was sold by all four national US wireless carriers: Verizon, AT&T, Sprint and T-Mobile.