RefurbMe lists a few different carrier-locked iPhones:
  • AT&T
  • T-Mobile
  • Sprint
  • Verizon
  • Tracfone
  • Cricket
  • Xfinity Mobile


You'll find all the carrier options under the Carrier header in the left-hand side menu. If you have a different carrier, or you might want to switch carriers in the future, your safest option is to go for an unlocked phone.