YOU SAID:

Somebody called my cellular telephone

INTO JAPANESE

誰かが私の携帯電話

BACK INTO ENGLISH

Someone is on my phone.

INTO JAPANESE

誰かが私の携帯電話です。

BACK INTO ENGLISH

Who is my cell phone.

INTO JAPANESE

誰が私の携帯電話です。

BACK INTO ENGLISH

Who is my cell phone.