Implement direct carrier billing in unity android for samsung galaxy store.

Hello,

I am messing with a problem that how cam I Implement direct carrier billing in unity android for samsung galaxy store. I know that google play handles it by himself in which countries google providing direct carrier billing on particular networks. But is that the same case with samsung galaxy store too or do I need to set some permissions or anything in my code. Please help me to get out of this any help would be appreciated.

Thanks in advance.