Enabling dual sim on my S21.

[Mysocalledella]

Hello guys, please I need help. I have an S21 Korean version with dual nano sim support but only one sim is active. I need to know if changing my csc will help activate the dual sim functionality, thanks 🙏🏾 

[JAMES4578]

Sorry ,yes seems to be the case https://phonedb.net/index.php?m=device&id=18628&c=samsung_sm-g991n_galaxy_s21_5g_td-lte_kr_256gb__sa...