通話 つうわ料金 りょうきん せいでしょう
tsūwaryōkinseideshō

Noun
Desu Copula
no-Adjective

Expresses probability in a polite manner ("probably…") of 通話料金制

1. Probably a call charge system.; Likely charged by call.

Polite
Presumptive
Conjecture
Computing