YOU SAID:

Hey, do you know where I placed my phone?

INTO JAPANESE

ねぇ、私が携帯電話をどこに置いたか知ってる？

BACK INTO ENGLISH

Hey, do you know where I left my cell phone?

INTO JAPANESE

ねえ、携帯電話をどこに置いたか知ってる？

BACK INTO ENGLISH

Hey, do you know where you put your phone?

INTO JAPANESE

ねえ、携帯をどこに置いたか知ってる？

BACK INTO ENGLISH

Hey, do you know where you put your phone?