I want it to be seamless. I don't want people to have to call one number if I'm on wifi and another if I'm on 4G. I want to be able to make an outbound call and not worry about if it's 4G or wifi. I want to be able to send and receive text messages just like normal.

I want wifi to be just like a cell tower. Are there other apps that can do that (and that aren't a nightmare to set up?)