A few minutes after I wrote this, they called my name to register the phone. First they charge my credit card but before I signed the agreement, the guy brought out the phone for me to test and I told him I wanted to test the camera. Took a picture of the white wall behind them and true enough, there was a blue circle at the centre. The promoter said it's not so apparent so I when to larger well lighted white wall to take a picture and the blue circle was much clearer.

I told them this one is a manufacturing defect and I want another phone but since a lot of people waiting also, they asked me to follow another staff upstairs to resolve the phone problem. There was an Indian and Malay Maxis stuff upstairs. The Indian guy said "we changed many phone, all also got this blue problem". I told him, that's not my problem because I know people who gotten their phones from Maxis and it didn't have this problem also. So the Malay guy attending to me when to get another phone. I tested it and still a blue circle but it was less.

He said the same thing again, we cannot keep changing for you sir because customer don't want to buy an opened package phone. I told him, look since you have 100 over stock today, go and find one for me until it works. It's not my problem whether customer want to buy the phone that's already opened, anyway the camera is not working, why would customer want to buy a non-working phone? I am not going to take a phone and then make a service request to repair this phone. He dissapeared for a few minutes and then appeared and said he will refund my money if I don't want the phone. Stuck with this choice, I took the second phone.

My only problem now is that the contract I signed has the IMEI number for the first phone. The guy said no problem, just bring the card that the phone comes with.  Now to do some more research what the heck is this blue circle. hopefully it's a software problem not hardware.
Guys, if you are buying an iPhone 4, please insist on testing the camera. Turn of HDR and then take a picture of a white wall (or white piece of paper). If the picture saved comes out with a slightly blue circle in the centre, the CMOS or white balance in the camera is not working properly. If every customer insist on this, Maxis will be able to pressure Apple and Apple will pressure Foxconn to make better phones.

Max - the solution Maxis offer me is  - Hand over the problem set to them , and they will claim 1 unit of phone from Apple , which take 1 - 2 weeks time  . You dont have to give them the box , and Apple will check and replace 1 unit (Phone only） which will have diff serial # and imei number with the box u are holding.

I've question maxis  -
- Why cant Apple exchange with a fullbox set with matching IMEI on box and phone . (Maxis replied  - This is Apple policy and procedure)
- Why cant Maxis just open and change me a set with problem free phone  and themself go deal with the RMA process within Maxis and Apple (Maxis replied - they are just a middle man getting stock from apple , this is Maxis policy and procedure)
- Why they wan me as a consumer to suffering all this RMA process (Maxis replied - This is the only solution they can give me)

I told maxis , In future , If I plan to sell off the phone , Buyer will suspect my phone will be either AP set or stolen set due to the box IMEI diff from phone

I've rejected Maxis offer above also  due to  - I'm worry to get a refurbish unit from Maxis / Apple - This is just 2 my cent .

If I not mistaken , Apple practice is to provide refurbish set for  1 to 1 exchange customer . Correct me if I'm wrong .

So now I can either selling off the iphone or accept the fact like others do or buy the apps which can solved the issue from APPStore which cost me USD$ 0.99 ......

Good Luck .

we should show the public how widespread the issue is, so that actions can be taken to resolve the issue. I've just posted my problem on top of an existing discussion in Maxis' Facebook page. Contribute yours there too!