crasher308These type of features require unique settings for every carrier even if they use the same network. This question is something you have to raise with ASUS North America. Maybe (hopefully) they're already working on it
Is this an issue that's being worked on? Honestly I love Asus as a company but I would not have bought this phone knowing that there's no support. Luckily I have coverage in most areas, but in some cases WiFi calling would be a better option
But why did it work on Google Fi if it's not supported on Mint Mobile and maybe even T-mobile? Considering the phone isn't "designed for Fi" and mainly uses the T-mobile network, the same as mint mobile. The setting was located in the Fi app, but if it was functioning why couldn't the setting be available in the device settings?