YOU SAID:
what are you doing with my phone?
INTO JAPANESE
自分の携帯電話で何をしてますか。
BACK INTO ENGLISH
What are you on my mobile phone?
INTO JAPANESE
私の携帯電話は何ですか。
BACK INTO ENGLISH
What is my phone?
INTO JAPANESE
自分の携帯電話は何ですか。
BACK INTO ENGLISH
What is your cell phone?
INTO JAPANESE
あなたの携帯電話は何ですか。
BACK INTO ENGLISH
What is your cell phone?
You've done this before, haven't you.