世代 せだい携帯 けいたい電話 でんわでしょう
jisedaikeitaidenwadeshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of 次世代携帯電話

1. Next-generation mobile phone, probably.; It will likely be a next-generation mobile phone.

Polite
Presumptive
Conjecture