Can The Sprint Iphone 6 Be Carrier Unlocked

Is that the same for iPhone 6?

I’m planning to purchase an iPhone 6 Plus from Sprint but if it cannot be unlocked “after contract is over”, I’m wasting time switching from AT&T. The reason I am asking this question is that the Sprint version of iPhone 6 plus is model A1524, the global phone, which can be used on both GSM and CDMA.

This model has wide spectrum of frequency and technically can be used anywhere in the world.

AT&T has model A1522 (GSM only version). I’m planning to use my iPhone in 5 different countries including all over Europe, Japan and Australia.

I know that Japan and Australia use CDMA mainly so I need A1524 unlocked eventually. I researched this subject all over the Internet but none of them answers clearly and some of them contradict each other. I know that lots of international businessmen are looking for an answer to this question.

Thank you.