Global sales of Samsung Electronics' Galaxy S3 will top 10 million units in July, just two months after its debut in the global smartphone market, Samsung's mobile business head said Monday.

"Samsung's Galaxy S3 was expected to see its global sales top 10 million units in July. It will become the fastest 10-million-seller in Samsung's history," Shin Jong-kyun, president and head of Samsung's mobile communications business, told reporters.

Here in Seoul, Samsung unveiled its third-generation smartphone in the Galaxy series on Monday. After debuting in London in early May, the Galaxy S3 planned to be shipped to 302 wireless carriers in 147 different countries worldwide by the end of next month.

Samsung launched the model in Seoul on third-generation (3G) networks on Monday, but it planned to roll out it on the faster, upgraded fourth-generation (4G) Long Term Evolution (LTE) networks next month through the country's three mobile carriers such as SK Telecom, KT and LG Uplus.

The Galaxy S3, running on Google's latest Android operating system Ice Cream Sandwich, features three major options of recognizing face, voice and motion.

The new smartphone features the 'Smart stay' function, or an eye sensor system that prevents the phone from dimming. It recognizes when the screen is being viewed by having the front camera identify users' eyes, so it prevents the screen from dimming.

The 'S Voice' is a voice command option to listen and respond to users' words. The option can be used to go off users' phone alarm, turn volume up, send text messages, organize schedules and automatically launch the camera and capture a photo.

The 'Direct call' option can understand users' motions. If users are text-messaging someone but decide to call them instead, users can simply lift their phones to their ears and the 'Direct call' function will dial their number automatically.

In addition, the 'S Beam' option enables Galaxy S3 owners to share contents between devices by tapping the smartphone back to back. The 'Pop up play' function enables users to play videos while web-surfing or text-messaging.