Currently I’m using iPhone 6 docomo. From 6s, user can unlock SIM. But iPhone 6 doesn’t allow to be unlocked. And 6s is very expensive ever so I missed to buy it. There are some rumor about SE, like it’s based on reusing dead stock part from 6s. “Inside The iPhone SE Reveals Surprising Developments In Apple’s Supply Chain“.
It’s ok for me. Possible to unlock SIM with reasonable price is good condition. So I ordered 64G Gold version on Docomo WebSite last week after apple unveiled. But I have not yet received to contact from them. Still waiting..