How to use Hangouts from the phone?

Hi everyone! I want to use my Hangouts from my Samsung S6 and to call from my Hangouts credit and not from the abonament. How can I do that? or:Hi eve

Hi everyone! I want to use my Hangouts from my Samsung S6 and to call from my Hangouts credit and not from the abonament. How can I do that?

or:Hi everyone! I want to use my Hangouts from my Samsung S6 and to call from my Hangouts credit and not from the abonament. How can I do that?

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