Question Wi Fi calling

[Jacksterss396]

I am using and Galaxy S8 AT&T phone but with a Mint Mobile SIM card.,If I put in a AT&T SIM card,I am able to turn on WiFi calling.
But since I am using a Mint Mobile SIM card, The phone will not show me the WiFi calling option.

 

[rgd1101]

Wi-Fi Calling & Text | Mint Mobile

Wi-Fi calling & text can decrease your data usage, extend your signal strength, and eliminate international roaming charges. Get free Wi-Fi calling & text with all Mint plans.

www.mintmobile.com

 

[Jacksterss396]

Wi-Fi Calling & Text | Mint Mobile

Wi-Fi calling & text can decrease your data usage, extend your signal strength, and eliminate international roaming charges. Get free Wi-Fi calling & text with all Mint plans.

www.mintmobile.com

I tried Mint Mobile, I think it's the phone or not everything was unlocked when I got the phone