In India we need to put One Time Password received through sms on mobile... So when we try to purchase app , store redirects us to browser for submitting OTP,,, Meanwhile we receive SMS containing OTP. But when we open sms for obtaining OTP without exiting OTP submission browser page, by pressing windows soft key or sms notification and get OTP, OTP submission browser page disappears and it returns back to app purchase... WHAT A GREAT OS LIMITATION of OS which brags about its multitasking abilities.