YOU SAID:

daniel is on his phone

INTO JAPANESE

ダニエルは彼の携帯電話に

BACK INTO ENGLISH

Daniel was on his cell phone

INTO JAPANESE

ダニエルは、彼の携帯電話

BACK INTO ENGLISH

Daniel is on his cell phone.

INTO JAPANESE

ダニエルは彼の携帯電話です。

BACK INTO ENGLISH

Daniel is on his cell phone.