How to unlock my iphone 5s from sprint?

I'm about travel to outside US and i want to use my phone over there. Is anyone know how to unlock it

The only legal and proper way is to contact Sprint. Only the carrier can unlock the phone. And if you have iOS 7 that is really the only option you have. But if you are still under contract you're going to have to pay cancellation fee of up to $350.

I unlocked my iPhone 5 a www.unlock-4.me when I went on an exchange trip for a month. I donated and I got my unlock code instantly. I was able to unlock my phone hassle free!