[Q] ROM Xperia Z3 dual D6633 exist ? topic

Hello,
I imported a sony xperia Z3 dual US and I'm happy.
To recall the dual Z3 or D6633 is a mobile with 2 sim cards, so there is an interface in android to manage this feature.
I looked everywhere but I can not find a "rom" section to view a custom rom. My mobile is already root.

Thank you for your reply.