I have an iPhone 5 LTE from Verizon. I will be living in China for a well over a year again in just a couple of weeks. I am hoping to find out whether or not my phone will work immediately with either of these services by just swapping my sim card without any modifications. Or will I have to jailbreak my phone? This is not a factory unlocked phone since I was using Verizon with it before.

I appreciate your time and help!