How to unlock iPhone 4 softbank Japan Locked? Please reply?

I have iPhone 4 Softbank Japan locked, i try to jail break but it dosnt work, if any one know how to unlock Please help i really appreciate and thankful!

The only thing Google pulls up is using a paid unlock service but I have no idea if those work. As far as things you can do yourself, you really can't.

I don't know why you have a Softbank iPhone if you're not in Japan and using Softbank anyway.

Only Softbank can unlock it.