Ok just an update hopefully not posted before because i lost track of the post so many people.

I emailed maxis and they called me to clarify few things. Firstly I asked about the warranty, lets say a person subscribes for the plan and then sells the Iphone away. The new owner can claim warranty without needing the previous owner whatsoever as usual T&C applies. Another thing is for postpaid users they actually can buy the Iphone 4 outright like now without a plan which is not stated in the website. For prepaid users, have to wait next month or so again no specific date to be able to buy outright.