Will Sprint Unlock My iPhone if I'm Traveling Internationally?

I'm going to Philippines with my friend in two months and I was wondering if Sprint would unlock our iPhones.
If they will, would it be free? Cause I plan on using it in Philippines. We're just going to buy a sim card.
When I was with T-Mobile, they unlocked my phone for China.

Yes, they'll unlock your iPhone if you're travelling internationally. And it's FREE!

Yes they will unlock it.

You can call the service provider about the Unlocking service.Whether it's free or cost. I don't know that… Because i haven't got the Unlocking service from service provider Sprint… But they will not give the unlock service soon. They will ask to wait for some days or months. So better get the Remote Unlock service for I-phone 4S at http://www.onlinegsmunlock.com/apple-iphone-4s/rs7wp9/ and Unlock it from USA SPRINT network lock. I have unlocked my I-Phone 4S from SPRINT network lock using this service. They use with any GSM Network sim card in Philippines…