Vocal Coach Reacts to Sam Smith - Too Good At Goodbyes (unedited version) 

You also have good range

Thanks

Thanks, I do my best.

Definitely not auto-tune. They could have manually moved some notes using some tuning software. People are used to hearing perfectly tuned vocals now so this is quite common nowadays in the pop music world. It isn’t needed for someone with Sam’'s skills in my own humble opinion.