Hi, the cost of the filter will be Rs.2499?- and you can get it from Mi.com.
You will be needing to replace the filter every six moths as recommended by the company or as according to your usage.Regarding other parts, you mostly won't be needing to care about them. Only the filter you will be needing to replace.
In my Redmi Note3 Number of person telling that they are getting phone is "Switch Off".But my phone always remain switch on. I have rebooted my phone number of times but problem still presist.
I am writing this message from Delhi India. Pl. advise action.