Until there is a diet that has long term success for a majority of its users I don’t think this mindset is healthy or realistic.

“According to the latest weight-loss research, 95% of dieters end up regaining the weight they lost within two years. Calorie-restricting diets are often successful at helping people lose weight, but they’re very unsuccessful at helping people maintain that weight loss.” source

I have a 4a and it does not have unlimited, just a heads up. My old pixel did have it, but not this one.