Samsung had last week unveiled the Galaxy S4 in New York and declared its official roll out with 327 operators across 155 countries with the official release date being April 26. Online marketing firm Tradus has started pre-booking of the latest smartphone in Samsung's Galaxy line - the Galaxy S4 - in India.

With the new Galaxy S4 smartphone, the company is increasing its rivalry with Apple. The phone boasts of a larger, sharper screen than its predecessor, the best-selling S3.

The Galaxy S4, which crams a 5-inch screen into body slightly smaller than the S III's, will go sale in the US sometime between the end of April and the end of June.