unlock phone for international
I am going to study abroad in Italy. I requested that my phone be unlocked by my carrier. They then sent me instructions to backup, reset and restore my iphone so that it will accept an international SIM card. How will I know it is unlocked? They said it will remain 'locked' until I backup, reset and restore my phone. But I do not see on the site where it says it is locked? Just want to be sure it is unlocked before I leave.
Appreciate any advise for international use! (Going to Rome, Italy)
iPhone 6s, iOS 10.2