Market data analysts Nielsen said Android smartphones have so far failed to make a dent on the big smartphone manufacturers such as Apple and RIM.

Figures show that BlackBerry, most popular in the corporate world, enjoys 35 per cent market share, while Apple's iPhone and Microsoft's Windows Mobile secures second and third places with 28 per cent and 19 per cent market share.

On the other hand, Android operating system is lagging far behind with 9 per cent of smartphone market share.

It should be noted here that the use of smartphones is on the rise. Figures show that 23 per cent of US phone users now have smartphones, 7 per cent up from the 16 per cent of previous year.

Separately, speculations are flying high that Apple CEO Steve Jobs could unveil the fourth-generation iPhone at the WWDC, which will be kicked off on Monday in San Francisco. The new version of iPhone is expected features `iPhone 4.0' operating system that will feature multitasking, a social-gaming network and a new advertising platform from Apple.