こう機能 きのう携帯 けいたい電話 でんわでしょう
kō kinō keitaidenwadeshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of 高機能携帯電話

1. Probably a smartphone.; It's likely a smartphone.

Polite
Presumptive
Conjecture