wifi calling on unlocked phone

[maxsummit]

hey guys I have a noob question. I just purchased an unlocked G2X and have tmobile which has terrible signal strength in my area. My contract is up next week and I wanted to know if I switched to at&t will I still be able to use the wifi calling feature if I keep the phone?

 

[GTWalling]

T-Mobile is the only one that offers Wi-Fi calling. Will not work on ATT as well as no 4G HSPA+ with ATT, you will only get 2G (Edge) with ATT.