So, I already know that WiFi calling is something that needs to be built into the system, and cannot just easily be put in. I also know only devices sold by T-Mobile currently have WiFi calling, and unlocked devices like the opo and moto phones don't. While I'm generally tech savvy, I'm no engineer. So my question is will it ever be possible to get T-Mobile WiFi calling on the op2, and what would it take to get it there?