我看了一下，wifi calling 跟provider 有关，是不是 unlock phone 不适合 Tracfone？
Yes, WiFi calling is dependent on your mobile service provider, as not all carriers support the feature, and even if your phone is capable of WiFi calling, you need to have a provider that enables it on your plan to use it; essentially, you can't make WiFi calls unless your carrier specifically offers WiFi calling functionality.
