you need to go into the settings and then apps and go to always on display,storage and clear cache,and clear data also then,press 3 dot's present overthere and then click .show system apps.then back,and click again 3 dot's and reset apps frequency sh...
you need to download Indian firmware and then flash it into your phone through your pc this a solution if you don't know how to flash the Indian firmware then u can ask me again, or you can go Samsung service centre