Than I ask my friend he said to me that, I have purchased redmi note 3 from mi site. I am not getting internet on my redmi note3 for mtnl, Mumbai network while same sim gets the internet on other even on other mi Mobile model handset.
Done all setting given by service provider, checked sim card at service provider end also it’s working fine. Anyway this is my favorite mobile I love it a lot. Redmi note 3