@Dimitrive won’t help. And you mean 184.108.40.206 by the way, which is out since the 2nd of March.
@Luucass, well Meizu themselves won’t unlock any additional LTE bands nor we can. Why exactly do you want Band 4 by the way? The EU ones are mostly Band 3, 7 or 20. Unless you are from Canada or the US, it doesn’t makes a lot of sense :)