PART I: So,... I moved to Tokyo two years ago and got an iPhone 6 with Softbank. Softbank agreed to unlock iPhone6s and later models two months after I signed a 2-year contract. Two years later, I ended up owning a locked iPhone 6 that Softbank won't unlock!@#! Thanks to Zisis and team, I now own an 'unlocked' iPhone 6 that still works in Japan! (beware of other IMEI unlocking services that, once unlocked from Softbank, can be used anywhere in the world, except Japan).
PART II: And so,... IPhoneUnlock. Zone's customer support was excellent, as was the info on their website. Because I really don't understand how they perform their 'magic" I had to accept the wait-time, though I had been warned. The price seemed a little high, too, but as I said, I don't really understand what is involved. Bottom line: clear information, good support and they successfully unlocked my Softbank iPhone 6 :)