I bought galaxy c9 pro in 2017 and still this is my primary phone, i have not bought any other phone because C9 pro is still performing like i just bought it.
From 2017 to now i have no any problem regarding my C9 pro.
1 year ago screen starts flickring then screen got replaced by service centre.
And i was also facing heating problem then service centre replaced my battery and now its fine.
I even dont know for how many years i will using it because it still performing like new.