Finally i received my GEVEY sim unlocker for the iphone 4 and i can assure you that it works in JA.
http://www.youtube.com/watch?v=QgTRXs4_u9c
Having been a blackberry user for years i really wanted to feel out the iphone thing and see what the craze is all about and i must say its a darn good phone.
It sits in a category on its own and cannot be compared.
I am hoping that a cheaper data plan comes out very soon so that i can part with RIM.
The software unlock is not out as yet and i was a bit skeptical in trying out this sim unlocker thing but i realized that the process to "activate" it was not so technical and once you get the hang of it and have to do it again it's like 15sec total. After all it beats the boot up time of any Blackberry.
If you happen to have an iphone 4 and want to use it but it is locked! Go for the gevey sim unlocker.