SM-G930FD (SM-G930F) Questions

[realdeal599]

I recently bought a SM-G930FD Unlocked International Dual SIM Samsung S7. Love the phone but there is no WiFi Calling option. My provider (Ting.com) has WiFi Calling feature. I am US based.

I am trying to figure out if I can get it enabled on my phone by flashing it with a different ROM. I am currently using G930FXXU1BOJG / G930FOJV1BPK1 / G930FXXU1BOJG

Can anyone offer any guidance as I have researched and researched without any success.

Thanks...